**How To Solve Ordered Pairs** – Graphing ordered pairs is just the beginning of the story. Once you have learned how to place points on the grid, you can use them to understand all kinds of mathematical relationships.

Coordinate planes can be used to plot points and map various relationships, such as the relationship between object distance and elapsed time. Many mathematical relationships are linear relationships. Let’s see what a linear relationship is.

## How To Solve Ordered Pairs

A linear relationship is a relationship between variables whose points lie on a straight line when plotted on a coordinate plane. Let’s start by looking at a set of points in quadrant I on the coordinate plane.

## Algebra I Unit 3: Systems Of Equations Unit

Coordinates) below. Do you see any pattern in the location of the points? If this pattern continues, what other points are there on the line?

If this pattern continued, you would have determined that the next ordered pair would be (5, 10). This makes sense because the point (5, 10) “aligns” with the other points in the series. Literally stand out from the rest. Applying the same logic, if this coordinate plane were larger, we could decide that the ordered pairs (6, 12) and (7, 14) also belong. It also aligns with other dots.

For values, the ordered pairs (1.5, 3), (2.5, 5), and (3.5, 7) should also appear in a row, right? See what that is.

See how all the dots connect to form lines. A straight line can therefore be thought of as an infinite number of individual points that share the same mathematical relationship. In this case the relationship would be:

## Solving Linear Systems

There are multiple ways to represent linear relationships. There are tables, linear graphs, and linear equations. A linear equation is a bivariate equation that plots an ordered pair as a straight line.

There are several ways to create graphs from linear equations. One way is to create a table of values:

Then plot these ordered pairs on the coordinate plane. Two points are enough to define a line. However, it is always recommended to draw more than 2 points to avoid potential mistakes.

Then draw a line through the points to show all the points on the line. The arrows at the ends of the graph indicate that the line continues infinitely in both directions. Every point on this line is the solution of the linear equation.

## Solved] Determine Whether The Given Ordered Pair Is A Solution To The…

So far, we’ve considered the following ideas about lines: A line is a visual representation of a linear equation, and the line itself is made up of an infinite number of points (or ordered pairs). The image below shows that there are some specific points on the straight line of the linear equation [latex]y=2x–5[/latex].

Every point on the line is a solution to the equation [latex]y=2x–5[/latex]. You can try any labeled dot, such as Ordered Pair [latex](1, −3)[/latex] .

You can also try other points on the line. Every point on the line is a solution to the equation [latex]y=2x–5[/latex]. All this means that it is very easy to determine whether an ordered pair is a solution to an equation. If the ordered pair lies on the line formed by the linear equation, it is the solution of the equation. But if the ordered pair is not on the line (no matter how close it looks), it is not a solution to the equation.

The linear equations [latex]x=2[/latex] and [latex]y=−3[/latex] each have only one variable. However, since they are linear equations, they are drawn in the coordinate plane just like the linear equations above. Consider the equation [latex]x=2[/latex] as [latex]x=0y+2[/latex] and [latex]y=−3[/latex] as [latex]y=0x– 3[/latex ].

## Relations, Graphs, And Functions

A line intersection is a point where the line intersects or intersects the horizontal and vertical axes. Think of the word “intersect” and remember what “prevention” means. The two words are similar and have the same meaning in this case.

The straight line in the graph below intersects the two coordinate axes. The point where the line intersects the x-axis is called the x-intercept. The y-intercept is the point where the line intersects the y-axis.

Let’s do this with the equation [latex]3y+2x=6[/latex]. We can see that the cutoff points of the straight line represented by this equation are [latex](0, 2)[/latex] and [latex](3, 0)[/latex]. That’s all you need to know.

A coordinate plane is a system for drawing and describing points and lines. A coordinate plane consists of a horizontal (x) axis and a vertical (y) axis. The intersection of these lines forms the origin at the [latex](0, 0)[/latex] point. The coordinate plane is divided into four quadrants. Combined, these features of coordinate systems enable graphical representation and communication of points, lines, and other algebraic concepts. Presentation on the topic: “Solve each equation for Warming y. 1. 2x + y = 3 2. –x + 3y = –6” — presentation transcript:

## Systems Of Linear Equations

4. Use x = –4, –2, 0, 2, and 4 to create the ordered pair y = –2x + 3 y = 2x – 4. (–4, –1), (–2, 0), (0, 1), (2, 2), (4, 3)

Sea levels are rising at a rate of about 2.5 millimeters per year. If this ratio continues, the function y = 2.5x can explain how many millimeters sea level will rise over the next x years. One way to understand functions like the above is to graph them. You can graph a function by finding ordered pairs that satisfy the function.

Graph the function over the specified area. x – 3y = –6; D: Step 1 Given the domain or value of x, solve for y. Subtract x – 3y = –6 –x x from both sides. –3y = –x – 6y y is multiplied by –3, so divide both sides by –3. Simplify.

Example 1A continued Graph the function in the specified domain. Step 2 Assigns the specified value of the field to x and finds the value of y. x (x, y) –3 (–3, 1) (0, 2) 3 (3, 3) 6 (6, 4)

#### Use The Elimination Method To Solve The System Of Equations.choose The Correct Ordered Pair. 3y=x 5

Graph the function over the specified area. f(x) = x2 – 3; D: Find the value of step 1 f(x) using the given value of the domain. f(x) = x2 – 3 (x, f(x)) x –2 –1 1 2 f(x) = (–2)2 – 3 = 1 f(x) = (–1)2 – 3 = –2 f(x) = 02 – 3 = –3 f(x) = 12 – 3 = –2 f(x) = 22 – 3 = 1 (–2, 1) (–1, –2) (0, –3) (1, –2) (2, 1)

Example 1B continued Graph the function in the specified domain. f(x) = x2 – 3; D: Step 2 Graph the ordered pairs. yx

14 Check this out! Example 1a Graph the function over the given area. –2x + y = 3; D: Step 1 Given the domain or value of x, solve for y. –2x + y = 3 +2x x Add 2x on both sides. y = 2x + 3

Graph the function over the specified area. –2x + y = 3; D: Substitute the given value of the step 2 field for x and find the value of y. x y = 2x + 3 (x, y) y = 2(–5) + 3 = –7 –5 (–5, –7) y = 2(–3) + 3 = –3 –3 (–3, – 3) y = 2(1) + 3 = 5 1 (1, 5) y = 2(4) + 3 = 11 4 (4, 11)

### Answered: Solve The System Of Equations. If The…

Look at this! Example 1b Graph the function over the given area. f(x) = x2 + 2; D: Find the value of step 1 f(x) using the given value of the domain. f(x) = x2 + 2 x (x, f(x)) f(x) = (–32) + 2= 11 –3 (–3, 11) f(x) = (–12 ) + 2= 3 –1 (–1, 3) f(x) = = 2 (0, 2) f(x) = = 3 1 (1, 3) 3 f(x) = = 11 (3, 11)

18 Look at this! Example 1b Graph the function over the given area. f(x) = x2 + 2; D: Step 2 Graph the ordered pairs.

19 Any number can be used as an input value if the entire domain of the function is real. This will generate an infinite number of ordered pairs that satisfy the function. Arrows are therefore drawn at the ends of straight or curved lines, representing an infinite number of ordered pairs. If no field is specified, the field is assumed to be a pure real number.

Use a function to generate ordered pairs by selecting multiple values for x. Step 1 Draw enough dots to see the pattern in the graph. Step 2 Connect the points with straight lines or smooth curves. stage 3

### Worked Example: Solutions To 2 Variable Equations (video)

Graph the function –3x + 2 = y. Step 1 Select some x-values and create ordered pairs. x –3x + 2 = y (x, y) –2 (–2, 8) –3(–2) + 2 = 8 –1 –3(–1) + 2 = 5 (–1, 5) –3 (0) + 2 =

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