Mr. Hickman is trying to convince his middle school typing students that it is better to slow down when they are learning to type. He argues that students who type too quickly make too many errors. To prove his point, Mr. Hickman has students type a sample paragraph. He records their average typing speed (in words per minute), x, and the number of errors they made, y. The least squares regression line of this data set is: ŷ=0.905x–27.505 For an increase of one word per minute in typing speed, the least squares regression line predicts an increase oferrors while typing the sample paragraph.