Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
4. Graphing a Function Rule
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Exercise 11 Page 257

Substitute some arbitrary values for x to find their corresponding y-values.

Practice makes perfect

One way to graph a function rule is by making a table of values and substituting some arbitrary values for x. Doing so will give the corresponding values of y, which we can use to form ( x, y) coordinate pairs.

x 3x-2 y (x,y)
-1 3( -1) - 2 -5 ( -1, -5)
0 3 ( 0) - 2 -2 ( 0, -2)
1 3( 1) - 2 1 ( 1, 1)
Let's plot these points on a coordinate plane.

By connecting all of our points with a line, we form the graph of the function rule.