# Lesson 5Lies and StatisticsPractice Understanding

For each representation of a function, decide if the function is linear, exponential, or neither. Justify your answer.

A.

linear

B.

exponential

C.

neither

### 2.

The fee for a taxi ride is for getting into the taxi plus per mile.

A.

linear

B.

exponential

C.

neither

A.

linear

B.

exponential

C.

neither

A.

linear

B.

exponential

C.

neither

A.

linear

B.

exponential

C.

neither

A.

linear

B.

exponential

C.

neither

A.

linear

B.

exponential

C.

neither

A.

linear

B.

exponential

C.

neither

## Set

Decide whether each statement is sometimes, always, or never true. Provide an explanation for your choice.

### 9.

The linear regression line passes through the average of the -values and the average of the -values.

A.

sometimes true

B.

always true

C.

never true

### 10.

A positive correlation coefficient means that the points in the scatterplot are very close together.

A.

sometimes true

B.

always true

C.

never true

### 11.

A negative residual means that the regression line has a negative slope.

A.

sometimes true

B.

always true

C.

never true

### 12.

A correlation coefficient close to means that a linear model is most appropriate for the data.

A.

sometimes true

B.

always true

C.

never true

## Go

Solve each equation for .

### 15.

Solve each equation for .

### 18.

Solve each equation for the indicated variable.

; Solve for .

; Solve for .

; Solve for .