Question

4. Suppose y varies directly with x. Write a direct variation equation that relates x and y.

v=-10 when χ=2
Ov=-5x
Ov=-1
Π
Ov=5x
Ov=x

Answer 1

y = - 5x

Explanation:

Given that y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = - 10 when x = 2, thus

k =
`(y)/(x)` =
`(-10)/(2)` = - 5

y = - 5x ← equation of variation