The table shows the grade, g, on a test when the number of problems, n, are correct. Write an equation to model the situation.
Problems on a Test
n / g
10 / 40
18 / 72
21 / 84
1. n=4g
2. g=4n
3. g=n+30
4. n=g-30
The correct equation to model the situation is:
g = 4n