Question

Choose all that are correct given the equation: y=1/4 x + 9

A.y=7.25 when x = -7
B.y=7 when x = -8
C.y=8.5 when x =-4
D.y=10.25 when x = 5

Answer 1

Answer: Option A, Option B, Option D.

Explanation:

Let's check each option.

A. Substitute
`x=-7` into the equation and evaluate in order to find the value of "y". This is:

`y=(1)/(4)x + 9\\\\y=(1)/(4)(-7) + 9\\\\y=7.25`

B. Substitute
`x=-8` into the equation and evaluate in order to find the value of "y". Then:

`y=(1)/(4)x + 9\\\\y=(1)/(4)(-8) + 9\\\\y=7`

C. Substitute
`x=-4` into the equation and evaluate to find the value of "y":

`y=(1)/(4)x + 9\\\\y=(1)/(4)(-4) + 9\\\\y=8`

D. Substitute
`x=5` into the equation and then evaluate in order to find the value of "y". You get that this is:

`y=(1)/(4)x + 9\\\\y=(1)/(4)(5) + 9\\\\y=10.25`

Then, the correct options are: Option A, Option B, Option D.