We have a point and a slope, so let's use the point slope formula!

where
x1=4
y1=2
and m=3
Hi, do you have to picture?
direct proportion y=kx , k is constant and k does not equal to 0.
17.5=k(21)
k=5/6
when x =39
y=5/6 ×39
y=32.5
130 revolutions is 130×85π=34714.60cm=347.146m or 347m to the nearest metre.
3 people rent 18 movies altogether. I person would rent 6 movies