The function p(x)=8x-10 shows the profit, in dollars, for selling x books.

p(10) is the profit, in dollars, from selling 10 books. Replace every copy of x with 10 and simplify

p(x) = 8x-10

p(10) = 8*10-10 every x is replaced with 10

p(10) = 80-10

p(10) = 70

So the profit is $70

i would pic false cause it goes down towards negative

step-by-step explanation:

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.