please help me as soon as possible!

Mr. Tims, a Junior High PE teacher at a large Junior High, wants to investigate the relationship between the time it takes his students to run three miles and their pulse rate. He randomly selects 23 of his more than 500 students and records the number of minutes it takes them to run three miles and their pulse rate as soon as they have nished the run. The computer output and corresponding graphs are shown below. Unstandardized Standard Error t p (Intercept) 479-934 66.228 7.247