Answer:
84
Step-by-step explanation:
Answer: (x+1)^2=12(y-2)
Step-by-step explanation:
Start with

Multiply both sides by 3:

Recall that 21/5=4.2 to claim the correct answer.
rate of change as in the gradient??
if yes then the formula would be rise over run, so y over x, therefore 1/3