A snack bar sells two sizes of drinks. A large drink is $5 and a small drink is $3. In one day, they sold 60 drinks for a total
of $220. Write a system of equations to determine how many small and large drinks they sold. S = number of small drinks
L = number of large drinks
Solve equation for S and L
It’s a positive slope, constant slope, and increasing function. Because it’s a straight line going diagonally to the top right, you know the slope is positive, constant, and the function is positive.