
As we have to solve for b, it means we have to isolate b
So first of all subtract
from both sides
So we get

Now we need b , but its b^2 , so we can take square root on both sides.
taking square roots on both sides

Hence option B is correct
Answer: x = -7
Step-by-step explanation: use the slope formula and slope intercept form y = mx + b to find the equation