Name ____________________________________________ Date ________ Per _______

Identifying Functions For each equation you are given either the domain or range. Make a t-chart to find the missing values. Then graph the points. 1. y  x 2

2. y  2 x  2

Domain= -3,-2, -1, 0, 1, 2,3

Domain: -3,-2, -1, 0, 1, 2,3

1 x 1 2

3. x  y 2

4. y 

Range:-3, -2, -1, 0, 1,2, 3

Domain: -6, -4, -2, 0, 2,4

5. Which of your graphs are straight lines? Those are called _____________________ equations. 6. Which of your graphs are not straight lines? Those are called ___________________________ equations.

7. Look at the t-charts that you made for problems #1-4. Which of them are functions? Explain how you know. If any of the problems are not functions, explain why they are not.

8. The Vertical Line Test is an easy way to look at a graph to decide if it is a function. Simply draw a vertical line through any/ or every part of the graph. If the line touches only ______ point at a time, it is a function. If at any time the vertical line passes through more than ________ point at a time, it is NOT a function. Do the Vertical Line Test on problems #1-4. Do you results match your results from #7?

9. a) Graph something that is a function.

B) Draw something that is NOT a function.