Evaluating Linear Functions – Grade 8

1. Evaluate the function at the specified value.

f(x) = 7x – 5;  x = 9

2. Evaluate the function at the specified value.

f(x) = -4(x + 3) – 14;  x = 4

3. Evaluate the function at the specified value.

f(x) = -x + 10;  x = 6

4. Evaluate the function at the specified value.

f(x) = -8x – 5;  x = (-2)

5. Evaluate the function at the specified value.

f(x) = -(3x – 2);  x = (-1)

6. Evaluate the function at the specified value.

f(x) = 10x + 7;  x = -2

7. Evaluate the function at the specified value.

f(x) = 3(-2x + 7);  x = -4

8. If  f(x) = -x – 7. Find

4f(-2) + 5f(1) =

9. What is the value of f(4), if;

f(x) = -4(x +3) – 12.

10. Evaluate the function at the specified value.

f(x) = 8x;  x = 3