so we are finding the distance he is from home
point slope form is
y-y1=m(x-x1)
given the point (x1,y1) and the slope m
so we are given (0.75,3) and the slope is 1.25
wait, the slope is -1.25 since the distance from his home is decreasing
so
y-3=-1.25(x-0.75) is point slope form