## Algebraic skills

### 2

Use the diagram to calculate the gradient as a decimal, correct to 1 decimal place.

### 3

Which of the following roads is the steepest?

### 4

Where does the line cut the y-axis?

### 5

What is the equation of the straight line, which passes through the point (0, -7) and has a gradient of 4, in the form .

### 6

Calculate the gradient of the line below.

### 7

Find the equation of the line below.

### 8

Solve the following equation.

.

### 9

Solve the following equation.

.

### 10

I think of a number, double it and add 1. The answer is 33.

Write down an equation to represent this information.

### 11

Solve the following inequation.

### 12

Solve the following inequation.

.

### 13

Solve the following inequation.

### 14

Given the equation , change the subject of the formula to D.

### 15

Given the equation, , change the subject of the formula to r.