Because all the homework she assigns is online, a statistics professor is able to track how long her students spend on homework assignments. She plots that data for the month of February against the scores on an exam she gave at the end of February for one class of 21 students, as shown above. The professor calculates the line of best fit to be *s* = 2.7*t* – 2.9, where *s* equals score and *t* equals hours spent on homework. Which of the following best explains how the number 2.7 in the equation relates to the data in the scatterplot?