Unit 4 - Line of Best Fit - Desmos Graphing Calculator
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Last updated over 3 years ago
25 questions
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For #1-3, tell whether x and y show a positive correlation, a negative correlation, or relatively no correlation.
Question 1
1.
Question 2
2.
Question 3
3.
For #4-9, use your graphing calculator to find the equation of the line of best fit (y=mx+b). Round slope and y-intercept to the nearest tenth. If your answer isn't showing as correct, check with me and we will see if it is calculator differences...
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
In the following problems (Number 8 - 19), find the equation for the line of best fit. Then evaluate it for the given x or y values. Round to the nearest tenth!
Question 8
8.
Question 9
9.
Approximate the value of y for x = 3.
Question 10
10.
Question 11
11.
Approximate the value of x for y = 3.
Question 12
12.
Question 13
13.
Approximate the value of y for x = 4.
Question 14
14.
Question 15
15.
Approximate the value of x for y = 4.
Question 16
16.
Question 17
17.
Approximate the value of y for x = 5.
Question 18
18.
Question 19
19.
Approximate the value of x for y = 5.
Use the data in the chart below for problems 20-25.
Question 20
20.
Find the equation of the line of best fit. Write it in slope-intercept form. Round your slope and intercept to the nearest tenth!
Question 21
21.
Using your equation from #20, what grade would you expect someone who studied for 7 hours to get?
Question 22
22.
Is your prediction in #21 interpolation or extrapolation?
Question 23
23.
Use your equation to predict the exam score for a student who spent 15 hours studying.
Question 24
24.
Is your prediction in #23 interpolation or extrapolation?
Question 25
25.
Which type of prediction is more reliable in this situation (and most), interpolation or extrapolation? Why?