Equations With Two Variables Practice Test

A company’s profit is modeled by $P=50n-200$, where $n$ is the number of items sold and $P$ is profit in dollars. What is the profit when $n=8$, and which part of the equation represents a fixed cost?

On a coordinate plane, points $A(0,3)$ and $B(4,11)$ lie on a line that represents the relationship between $x$ and $y$. If $x$ increases by 1, by how much does $y$ change on this line?