# Lesson 5 Lies and Statistics Practice Understanding

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

### 1.

linear

exponential

neither

### 2.

The fee for a taxi ride is

linear

exponential

neither

### 3.

linear

exponential

neither

### 4.

linear

exponential

neither

### 5.

linear

exponential

neither

### 6.

linear

exponential

neither

### 7.

linear

exponential

neither

### 8.

linear

exponential

neither

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

sometimes true

always true

never true

### 10.

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

sometimes true

always true

never true

### 11.

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

sometimes true

always true

never true

### 12.

A correlation coefficient close to

sometimes true

always true

never true

Solve each equation for

### 13.

### 14.

### 15.

Solve each equation for

### 16.

### 17.

### 18.

Solve each equation for the indicated variable.