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.

Tags

CCSS.8.F.A.1

Front

What does it mean to evaluate a function?

Back

To evaluate a function means to find the output value when a specific input value is substituted into the function.

Tags

CCSS.HSF.IF.A.2

Front

Evaluate f(x) = 2x; Find f(-3)

Back

-6

Tags

CCSS.HSF.IF.A.2

Front

Evaluate h(x) = -3x - 1; Find h(-3)

Back

8

Tags

CCSS.HSF.IF.A.2

Front

Evaluate g(x) = -2x - 4; Find g(1)

Back

-6

Tags

CCSS.HSF.IF.A.2

Front

Evaluate f(x) = 21 - 4x; Find f(3)

Back

9

Tags

CCSS.HSF.IF.A.2

Front

Evaluate f(x) = -2x + 5; Find f(0)

Back

5

Tags

CCSS.HSF.IF.A.2

Front

What is the output of a function when the input is zero?

Back

The output of a function when the input is zero is found by substituting 0 into the function.

Tags

CCSS.HSF.IF.A.2

Front

What is the slope of the function f(x) = -2x + 5?

Back

The slope is -2, indicating the function decreases as x increases.

Tags

CCSS.8.EE.B.5

Front

What is the y-intercept of the function f(x) = 2x?

Back

The y-intercept is 0, meaning the function crosses the y-axis at (0,0).