Year 9 Unit 18 Graphs

Work out the gradient of line a on the graph.

Find the gradient of a straight line between:

(0, 6) and (6, −6)

Find the gradient of the line with this equation

2 + 3x = y

Write formula in the form y = mx + c

3(x − y) = 2

Find the gradient of this line

x = 2y + 4

These are the equations of five straight lines.

A: y + 2x = 5

B: y + 5 = 2x

C: 2y = 7 − 4x

D: 2x + 2y = 5

E: 2x − y = 1

Which lines are parallel?

• A and C; B and E

• A and D; D and E

• A and B; C and D

• A, B and E

Use the graph to find solutions to these pair of simultaneous

equations.

y + 20 = 3x and x + 2y = 5

• (6.5, -0.7)

• (5.5, -3.5)

• (4.4, 0.4)

The cost of hiring a car is $40 plus a charge of $30 per day.

How much will it cost to hire a car for two days?

The cost of hiring a car is $40 plus a charge of $30 per day.

Find a formula to show the cost (c), in dollars, of hiring a car for (d) days.