Which of the following regression equations best fits the data shown below? A. y = 8.12•1.84^x
B. y = 12.11•1.36^x
C. y = 4.89•1.47^x

D. y = 6.131•94^x

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

the one below it is a function

angle efh= angle egh