Question

Data was collected on the amount of time that a random sample of 8 students spent studying for a test and the grades they earned on the test. A scatter plot fit we’re created for the data.

Determine the equation of the line of fit.
A. y=15x+60
B. y=15x+30
C. y=30x+60
D. y=30x+30

Answer 1

answer is B. Y= 15x+30 Because the line intersects the y-axis at 30 and to calculate slope you can use the rise over run (rise/run) method, calculate how far one point is from the next closest point through how high/low it goes and then divide this number by how far apart the two points are horizontally.