8.3 Proportions

Proportions

1. 1. Define a proportional relationship.
2. 2. Test whether two quantities are in a proportional relationship using a ratio table.
3. 3. Determine the constant of proportionality.
4. 4. Write an equation of the form y = kx for a proportional relationship.
5. 5. Graph proportional relationships and interpret the gradient as the constant of proportionality.
6. 6. Apply direct proportion to solve word problems (recipes, distance-time, costs).