Question

Determine whether y varies directly with x, If so, find the constant of variation k and write the equation.
x y
4 6.4
7 11.2
10 16
13 20.8
can someone plz help me

Answer 1

if y varies directly with x then when x increases y increases and when x decreases then y decreases . in addition to that the amount of change is constant for any set (x, y)

Answer 2

so if y increases by three then so will x?