Question

Given: 'y' varies directly with 'x' when k = 4/3

Mark says that the points (8, 6) would be on the line that models this situation.
Sue says that (6, 8) would be on the line that models this situation.

Who is correct? and why?

Answer 1

Sue is correct.
When you plug in the values for x you find that Mark's answer for y should be 32/3 and Sue's answer for y should be 8 which is the answer she has.