Question

16 POINTS determine whether y varies directly with x, if so find the constant of the variable k. Show steps please?

x y
6 6.4
7 11.2
10 16
13 20.8

Answer 1

In this problem y varies directly with x. The constant of variation, k, is equal to 1.60

Answer 2

y = kx

6.4 = k(6)

K=6.4/6 = 1.066 = 1.07

11.2 = k(7)

k = 11.2/7 =1.6

16 =k(10)

K = 16/10 = 1.6

20.8 = k(13)

K = 20.8/13 = 1.6

3 of them are directly, but the first one has a different K value so it does not vary directly