Functions Review

Front

What is a function?

Back

A function is a relation where every input (x-value) has exactly one output (y-value).

Front

Translate the function notation f(-1)=5 into a coordinate point.

Back

(-1, 5)

Front

What type of slope does a line that decreases from left to right have?

Back

Negative slope.

Front

What is the cost function for a plumber who charges $50 for a house call plus $12 per hour?

Back

P(x) = 50 + 12x

Front

Evaluate P(4) for the plumber's cost function P(x) = 50 + 12x.

Back

$98

Front

What does the notation f(x) represent in a function?

Back

f(x) represents the output of the function for a given input x.

Front

If f(33) = 11, what does this indicate about the function?

Back

When the input is 33, the output is 11.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is zero.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

If a function has an input of 2 and an output of 5, how can this be expressed in function notation?

Back

f(2) = 5.