Answer: -2.00
Explanation:
The parent function for linear functions is y=mx +b.
First, find the slope using the slope formula (y2-y1)/(x2-x1)
(30-10)/(8-3) = 20/5 = 4
Now, plug in known values to solve for "b", which is the y-intercept:
10 = 4(3) + b
10 = 12 + b
10 - 12 = b
-2 = b