Question

Find an equation of variation where y varies directly as x and y = 8 when x = 2, find y when x = 10.

y=???

Answer 1

y
`\alpha x`
y=mx
Where m is a constant of variation;
y=8, x=2
8=2m
m=8/2
m=4
y=4x
When x=10
y=4(10)
y=40