When x increases from a to a + 2, y increases by a difference of 6. For which functions is this statement true?

1 answer:

5 0

x2-x1 =a+2-a=2

y2-y1= 3x2 +2 -3x1 -2= 3(x2-x1)=3*2=6

correct answer is C

if D, then
y2-y1=9(x2-x1)=9*2=18, so D is wrong

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