A student has started a lawn care business. He charges $15 per hour to mow lawns and $20 per hour for gardening. Because he is still in school, he is only allowed to work for at most 20 hours per week. His goal is to make at least $300 per week. One of the constraints (equation) has already been drawn on the graph. Draw the graph of the other relevant constraint (equation).

Indicate the solution region by shading the graph to represent the number of hours the student can work at each job and meet his goal