Evaluating Functions

Front

What is a function?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Front

What does it mean to evaluate a function?

Back

To evaluate a function means to calculate the output value of the function for a given input.

Front

If f(x) = 2x + 3, what is f(5)?

Back

f(5) = 2(5) + 3 = 10 + 3 = 13.

Front

What is the value of r(-2) if r(x) = 2x - 2?

Back

r(-2) = 2(-2) - 2 = -4 - 2 = -6.

Front

How do you find f(-8) if f(x) = x^2?

Back

f(-8) = (-8)^2 = 64.

Front

What is the output of f(x) = 3x + 1 when x = 0?

Back

f(0) = 3(0) + 1 = 0 + 1 = 1.

Front

If f(x) = x^2 - 4, what is f(2)?

Back

f(2) = 2^2 - 4 = 4 - 4 = 0.

Front

What is the value of f(10) if f(x) = 3x - 15?

Back

f(10) = 3(10) - 15 = 30 - 15 = 15.

Front

Given f(x) = 5x + 2, find f(-4).

Back

f(-4) = 5(-4) + 2 = -20 + 2 = -18.

Front

What is the value of f(0) if f(x) = x^2 + 1?

Back

f(0) = 0^2 + 1 = 0 + 1 = 1.