Help with this one

A sample of students is selected. The distance X {in km} henveen a student's plaoe of residenoe and the time 1"{in minums) it takes to get to the universin are recorded. The least squares regression ne is calculated to he j:2.3+l.?x. It is reported that T5% of the variation in time can he aocounted for by its regression on distance. {a} What is the value of the correlation between distanoe and time. {b} One student lives 5 kilometeTs from the University and takes 3 minutes to get there. What is the value ofthe residual of this student? {c} If we had instead measured distance in miles (1 mile = 1.61 km}, which of the following values would change: slope, intemept or correlation