Question

Help!!

1.does y vary directly with x? If it does, write an equation for the direct variation.

x|y
−3|2.25
1 |−0.75
4 |−3

Answer 1

y = -.75 x

Explanation:

To determine if y varies directly with x, we look at y/x and see if it is a constant

y/x = 2.25/-3 = -.75

= -.75/1 = -.75

=-3/4 = -.75

Since it is a constant, it has direct variation. The constant of variation is -.75

y = -.75 x