Exercise 18 Page 188

We want to complete a table. We can use the portion where both values are known to find the missing values.

We know that for each 3.75 cups of tea we add 1.5 cups of milk. Let's write this as a ratio. 3.75cups of tea/1.5cups of milk or 3.75/1.5We will use this rate to find the missing values.

First Value

We can find an equivalent ratio with a denominator of 1 to find how much tea we use for 1 cup of milk.

We found that we add 2.5 cups of tea for each 1 cup of milk.

Second Value

Now, we can find an equivalent ratio with a denominator of 3.5 to find how much tea we use for 3.5 cup of milk.

We found that we add 8.75 cups of tea for each 3.5 cup of milk.

Third Value

Finally, we can find an equivalent ratio with a denominator of 2.5 to find how much tea we use for 2.5 cup of milk.

We found that we add 6.25 cups of tea for each 3.5 cup of milk.

The equivalent ratios are 3.75:1.5, 2.5:1, 8.75:3.5, and 6.25:2.5.