Question

Suppose y varies directly with x write a direct variation equation that relates x and y
Y=10.4 when x =4

A. Y=3.4x
B. Y=3.8x
C. Y=3.2x
D. Y=2.6x

Answer 1

Answer:

Option D

Y=2.6x

Step-by-step explanation:

When y=10.4 and x=4, these two can be related by the equation

10.4=4x

Making x the subject of the formula then x=10.4/4=2.6

Relating x and y then we have the equation

Y=2.6x

For example, when x is 4 then y=2.6x=2.6(4)=10.4 as given in the question. Therefore, the right option is D

Y=2.6x