Answer:
Step-by-step explanation:
Given
[tex]2r + 4 = y + 2[/tex]
[tex]2-r = y[/tex]
[tex]y=-22 + 16 +34[/tex]
[tex]r- y = 13[/tex]
Required
Determine which is not a function
A [linear] function is always in the form:
[tex]y = mx + b[/tex]
Checking each of the given options:
A.
[tex]2r + 4 = y + 2[/tex]
Subtract 2 from both sides
[tex]2r + 4 - 2= y + 2 - 2[/tex]
[tex]2r + 2= y[/tex]
Reorder
[tex]y = 2r + 2[/tex]
B.
[tex]2 - r = y[/tex]
Reorder
[tex]y = 2 - r[/tex]
C.
[tex]y=-22 + 16 +34[/tex]
[tex]y=28[/tex]
D.
[tex]r- y = 13[/tex]
Subtract r from both sides
[tex]r - r - y = 13 - r[/tex]
[tex]- y = 13 - r[/tex]
Multiply both sides by -1
[tex]y = -13 + r[/tex]
[tex]y = r - 13[/tex]
Only option C does not conform with the general form [tex]y = mx + b[/tex]
Hence;
Option C answers the question
