1. The problem asks to identify the type of variable that is predicted in a data set. 2. The variable to be predicted, or the y-value, is called the **response variable**. This is because it responds to changes in the explanatory variable. 3. The second part asks about making predictions within the range of the data. 4. Making predictions for values inside the range of the data is called **interpolation**. This is different from extrapolation, which predicts outside the data range. Final answers: a) The variable to be predicted is the **response variable**. b) Making predictions inside the data range is called **interpolation**.