Ortencia made the following grades on her tests: test #1, 90; test #2, 80; test #3, 95; test #4, 90; test #5, 85. She wants to plot her progress on a coordinate plane where the test number is on the x-axis and the test grade is on the y-axis.
Question: a) Write this relation as a set of ordered pairs. b) What is the domain? c) What is the range?