# Lesson 3: Revisiting Proportional Relationships

Let’s use constants of proportionality to solve more problems.

## 3.1: Recipe Ratios

A recipe calls for $\frac12$ cup sugar and 1 cup flour. Complete the table to show how much sugar and flour to use in different numbers of batches of the recipe.

sugar (cups) flour (cups)
row 1 $\frac12$ 1
row 2 $\frac34$
row 3   $1\frac34$
row 4 1
row 5   $2\frac12$