Mathematics for IGCSE & O level - Proportion (Section 1 - No. 7)

The amount of money you have, *m*, is directly proportional to the number of ice creams you have, *i*. Which of the following is/are true?

m=ki

i=km

m/i=k

m*i=k

When the amounts are directly proportional, the relationship can be expressed as m=ki or i=km or m/i=k