Question

The table represents data collected on the time spent studying (in minutes) and the resulting test grade.

Time Spent Studying (min) 52 37 31 9 26 40 22 10 45 34 19 60
Grade on Test 95 84 72 58 77 86 72 43 90 81 62 98
Part 1: Create a scatter plot with the predicted line of best fit drawn on it. Determine the type of correlation (if any), and predict the model that will be used.
Part 2: Find the line of best fit for the data either by hand or using technology. Explain your method. Find the predicted score for each time listed in the table.

Answer 1

I have already done most of part one, but I don't understand what it means by model.

Answer 2

Is the line linear or curved?

Answer 3

Linear

Answer 4

use equation y=mx+b to find the equation of the line

Answer 5

actually never mind, i read the question wrong

Answer 6

Okay

Answer 7

I guess the correlation is that the amount of time studying is proportional to the grade on the test

Answer 8

It has a positive correlation, because the y value increases alongside the x value.

Answer 9

The only problem I have is the model.

Answer 10

are they maybe asking what type of graph is best?

Answer 11

No, I have to use a scatter plot.

Answer 12

hmmm, maybe find the equation of the line using y=mx+b which will model the graph

Answer 13

have you done that in class?

Answer 14

I haven't used slop-intercept form in this module yet, and it wasn't in the lesson.

Answer 15

ok, so for part 2 when they are asking for line of best fit are you just supposed to connect the dots?

Answer 16

Not quite. I just had Excel calculate it. That's not what I'm having trouble on, though. I don't know what it means by model.

Answer 17

ya sorry dude, i don't quite get what it's asking. bump your question to the top and see if someone else can help.