Evaluate Linear Functions Using Input Values

Use the function y = -3x to find y when x = 5

Mathematical Equivalence

OFF

Use the function y = 5x to find y when x = 2

Use the function y = x + 7 to find y when x = 3

e

f

g

h

7

3

-9

-5

5

-3

-1

-7

g

b

f

e

-9

7

-5

-7

5

-1

-3

1

Evaluate f(-2) if f(x) = x+3

• -1

• 1

• 5

• -5

What is f(1)?

• 1

• 5

• 0

• 4

If f(x) = x - 5, what is the value of x when f(x) = 15?

• 20

• 10

• 5

• 0