4. Graphing a Function Rule
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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 | 5+2x | y | (x,y) |
---|---|---|---|
-1 | 5+2(-1) | 3 | (-1,3) |
0 | 5+2(0) | 5 | (0,5) |
1 | 5+2(1) | 7 | (1,7) |
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.