Peter was given $4050 to pay for his 1st year of rent for college. If his rent is $450, make a table to describe the data.

1. this graph is actually an area. it is demarcated by the vertical line x=7. everything to the right of this line (excluding the line itself) is part of the graph.

2. this graph is also an area, but this time to the left of x=17, and inclusive of the line itself (because of the  ≤)