C = - 1/2t + 6
The equation usually looks like this
C = k*t + n
If t = 0 than
C = n (from the table we see that C is 6 if t = 0) than
N = 6 too
For t = 2 and c = 5 we have the equation
5 = 2k + 6
2k = -1
K = -1/2
49 is 7(7)
122 is 11(11)
144 is 12(12)
So D. 88 is the imposter here.
A - A bar graph would be most appropriate
I believe it is f(x)=5|x|
I suggest you get a second opinion, though
