Answer:
Step-by-step explanation:4767
You would turn this into a function f(x). So the constant rate (or slope) is 0.5, so you start off with f(x)=0.5x. But you know that it starts at 8000, which is your intercept. So your final result is
F(x)= 0.5x +8000
(x^2+2x+1)+(y^2+6y+9)=10
(x+1)^2 + (y+3)^2 = 10
centre (-1,-3) radius sqrt10
His current quiz score would be 60