Proportion in context

Maths

1 bar of chocolate costs £2.10.  How much do 3 bars of chocolate cost?

Four tickets to the cinema cost £42. How much do 8 tickets cost?

Four tickets to the cinema cost £42. How much do 18 tickets cost?

Fill in the gaps: You can use .............. .............. to work out the best value for money.

x and y are directly proportional. What happens to y if x doubles?

Complete the sentence: When two quantities are in ........................ , when one variable doubles, the other doubles too.

Complete the sentence: When two quantities are in direction proportion, when one variable is zero, the other is .............

x and y are in direction proportion. When x is 4 y is 11. What is the value of y when x = 12?

The cost of T shirts online at £12 each. The postage charge is £3.50 per order. How much will it cost to order 2 T shirts?

Think about the previous question: Are the number of T-shirts and the cost in direct proportion?

What is the constant of proportionality in the table below?

What is the constant of proportionality between m and n?