A local convenience store owner spent $10 on pencils to resell at the store. What is the equation of the store's revenue if each pencil sells for $0.50? Graph the equation.

1. Read the problem and then reread the problem, determining the known quantities.
2. Identify the slope and the y-intercept.
3. Substitute the slope and y-intercept into the equation y = mx + b, where m is the slope and b is the y-intercept.