suppose that y is directly proportional to x and that y=10 when x=3.

Question

Find the constant of proportionality k.
K=

Use y=kx to find when x=6
Y=

Is the answer: K=3.33 Y=9.99

Please help. I'm so confused.

Answer 1

y = kx
given: x=3, y=10
10 = k(3)
k = 10/3

so y = (10/3)x
when x = 6
y = (10/3)(6) = 20