Question

The value of y varies directly with x, and y = 63 when x = 14. Find y when x = 28.

Answer 1

Y = kx
k = y/x = 63/14 = 4.5
so
y = 4.5(28) = 126

answer
y = 126 when x = 28.

Answer 2

Y=kx
63=14k
63/14=k
k=4.5
y=4.5•28
ANSWER: y=126