Evaluating Functions

Front

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

Back

f(3) = 2(3) + 5 = 6 + 5 = 11.

Front

What is the value of f(-3) if f(x) = 2x + 5?

Back

f(-3) = 2(-3) + 5 = -6 + 5 = -1.

Front

Which table represents a function?

Back

A function must have unique outputs for each input. Table D represents a function.

Front

f(x) is the same thing as ______.

Back

y.

Front

What is the value of f(-3) if f(x) = 2x - 1?

Back

f(-3) = 2(-3) - 1 = -6 - 1 = -7.

Front

What is the definition of a function?

Back

A function is a relation that assigns exactly one output for each input.

Front

What does it mean for a function to be linear?

Back

A linear function has a constant rate of change and can be represented by a straight line on a graph.

Front

How do you evaluate f(x) = 3x + 4 at x = 2?

Back

f(2) = 3(2) + 4 = 6 + 4 = 10.

Front

What is the slope of the function f(x) = 2x + 3?

Back

The slope is 2.

Front

What is the y-intercept of the function f(x) = -x + 5?

Back

The y-intercept is 5.