Question

*Will give medal!* Which is the direct linear variation equation for the relationship?

y varies directly with x and y = 10 when x = 2.

A. y = x – 8
B. y = x + 8
C. y = 5x
D. y = 2x + 6

Answer 1

c. y=5x
Varies directly means to multiply and add a constant.
Y varies directly with X means y=kx.
Since y=10 when x=2
10=k2 so k=5
y=5x