An equation is a formula containing one or more variables. Types include: straight line, algebraic, simultaneous and equations that require you to change the subject of a formula.

Calculate the gradient, leaving your answer as a fraction, fully simplified.

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

0.2

5.0

7.2

Which of the following roads is the steepest?

A

B

C

Where does the line cut the y-axis?

(0,2)

(-2, 0)

(0,-2)

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

Calculate the gradient of the line below.

-0.6

-1.7

0.6

Find the equation of the line below.

Solve the following equation.

.

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

Write down an equation to represent this information.

Solve the following inequation.

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

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