Linear Functions Practice Test

A line has slope $m=-\frac{3}{4}$ and passes through the point $(4,2)$. Which equation is the line in point-slope form?

A water tank contains 120 liters initially and is draining at a constant rate of 8 liters per minute. Let $V(t)$ be the volume (in liters) after $t$ minutes. What is the $y$-intercept of the graph of $V(t)$ versus $t$, and what does it represent?