The constant of proportionality

Maths

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?

Which graph does not show to direct proportion?

Which table does not shows direct proportion?

x and y are directly proportional as shown in the graph. What is the value of y when x = 10?