Question

1. a teacher made the following graph showing the number of hours that a student studied for an exam versus their exam grade. predict the grade of a student if they studied for four hours. a. 100 b. 90 c. 60 d. 75

Explanation:

Step1: Locate x - value on graph

Find \(x = 4\) (hours studying) on the x - axis.

Step2: Estimate y - value

Looking at the trend of the data points (which seem to have a positive correlation), and considering the spacing of the grid (each grid square likely represents 10 units on the y - axis for grade). The data points at \(x = 2\) (grade around 70) and \(x=3\) (grade around 70) suggest that for \(x = 4\), a reasonable estimate (since the increase from \(x = 1\) to \(x = 2\) and \(x=2\) to \(x = 3\) is not extremely steep) is 75.

Answer:

D. 75