When finding slope on a graph, how do you know whether to go down or up when finding the rise (rise/run)?

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

Brent wants to know what is 5 x 1/2

Graph the equation by plotting point x=2