Answer: x = -2
x + 9 = 7, Move the constant to the right.
x =7 -9 now calculate that.
then you get x = -2
Hope that helps ya out :D
If the outer was the out of the data set it would make it “decrease”
The answer is c = 0
Explanation, see the picture
The zeros of function are x-s, for which f(x) = 0: