Ascale of a classroom. the scale in the drawing is 2 inches represent 9 feet. the actual length is 36 feet. what is the length of the classroom.

You can put the dollars on the y axis and the hours on the x axis. Whenever the hours increase by 1, move over 1 on the x axis and 7.50 up on the y axis.

The first point should be (1, $7.50).

                                        ↑      ↑

                                    hours, money earned

The second point then will be (2, $15.00), the third will be (3, $22.500) and so on.