A food scientist wants to understand how much sugar children like in their desserts. He sets up a study where children taste cups of vanilla pudding with varying sweetness and rate each cup on a scale of 1 to 10, where 10 is excellent.
For each tasting, the food scientist writes down the grams of sugar in the pudding cup, x, as well as its rating, y.
The least squares regression line of this data set is:
y= 0.404x – 3.309
Complete the following sentence:
For each additional gram of sugar in a pudding cup, the least squares regression line predicts its rating will increase by ____