Analyzing Lines of Best Fit of Scatterplots

Multiple Choice

1. The daily attendance at a bowling alley was recorded for 15 days. The scatterplot shows the number of lanes rented each day and the number of people who bowled that day. Which statement is best supported by the scatterplot?

UNIT 3 QUIZ PART 1 - 86% CORRECT

• There is a non-linear association between the number of lanes rented and the number of people who bowl.

• There is a negative linear association between the number of lanes rented and the number of people who bowl.

• There is no apparent association between the number of lanes rented and the number of people who bowl.

• There is a positive linear association between the number of lanes rented and the number of people who bowl.

Multiple Choice

2. Which scatterplot does NOT suggest a linear association between y and x?

UNIT 3 QUIZ PART 1 - 71% CORRECT

Multiple Choice

3. The scatterplot shows the energy used in watts and the light output in lumens per watt of several light-bulbs. Which statement best describes the association between the energy and light output of these light-bulbs?

UNIT 3 QUIZ PART 1 - 71% CORRECT

• As the energy increases, the light output increases.

• As the energy increases, the light output decreases.

• As the energy increases, the light output remains the same.

• There is no apparent association between the energy and light output.

DIRECTIONS: Watch the video and take notes of the vocabulary and determining lines of best fit.

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Video Notes:
Scatter-plot Graphs - "Lines of Best Fit"

Draw

INDEPENDENT PRACTICE

5. The following scatter-plot represents the number of calories and total fat in grams for specific sandwich meals.

Make an estimate of the “line of best fit” with a different color that holds majority of the data points.

Open Ended

PARTNER PRACTICE: Think-Write-Share

6. Describe in complete sentences the error that was made in making the “line of best fit” for the given scatter-plot displayed.

Drag and Drop

PARTNER PRACTICE

11. Drag and drop the following values of the scatter-plot representation.

REMEMBER: Use y₁ ~ mx₁ + b on DESMOS Graphing Calculator.

y-intercept (b): ​

Placeholder

​ slope (m):​ ​

Placeholder

Drag these tiles and drop them in the correct blank above

153.6

13.2

200.2

250.3

15.2

20.5

180.6

8.5

Math Response

PARTNER PRACTICE

12. Determine the linear equation in slope-intercept form of the scatter-plots line of best fit.

Round values of the nearest whole number.

HINT: Slope-Intercept Form: y=mx+b

Type answer here

Correct Answer: y=6x+43

Deg^°

Rad

Multiple Choice

EXIT TICKET 12/02 - TEK 8.5D

The table shows the distance you travel over a 6-hour period.

Which linear equation that represents the line of best fit of the data set.

• y= 55x + 12

• y= 12x + 55

• y= 55x - 12

• y= -55x + 12