Answer:
y = -2x - 3
Step-by-step explanation:
(1, M) this represents the miles per hour, which'll help find the other coordinates.
First, create an equation with the criteria given.
If we let x be your number,

(

is twice the product of 3 and x, and if it exceeds

by 10, then we add 10 to

to make the two sides of the equation equal.)
Now, solve for

.
There were 200 books sold. so, they need to sell 300 more to have 500 total books sold.