Line of Best Fit Meaning Lesson

8 Slides • 9 Questions

1

Dropdown

The data has

association.

2

3

4

Drag and Drop

When scatter plots demonstrate a

relationship, a

line can be used to show the general pattern of the data.

A

line, or "line of best fit", is a straight line that should lie as close as possible to the

of data in the scatter plot.

Drag these tiles and drop them in the correct blank above

linear

straight

trend

points

associations

equations

functions

curved

5

Match

Match the correct description to the correct scatter plot and trend line.

no, trend line is negative

yes

no, trend line is too high

no, trend line is too low

6

7

Drag and Drop

Writing Equations of Trend Lines

1. Choose any two points on the trend line and set up a ratio of rise/run to find the

of the line, or "m".

2.Look at the y-axis to find the

of the line, or "b".

3.Use these to write an equation in slope-intercept form: y =

x +

Drag these tiles and drop them in the correct blank above

b

m

x

y

z

x-intercept

slope

y-intercept

8

Math Response

Write an equation in slope-intercept form for the trend line.

Type answer here

Deg^°

Rad

9

10

Draw

Circle the graph that shows the best line of fit for the data set.

11

12

Hotspot

Select the graph that show the best trend line.

13

14

Multiple Choice

Which equation represents the line of best fit for the data in the scatter plot?

1

$y=x+9$

2

$y=-x-9$

3

$y=-x+9$

4

$y=x-9$

15

16

Multiple Choice

Exit Ticket:

Which equation represents the line of best fit for the data in the scatter plot?

1

$y=-2x+1$

2

$y=2x+1$

3

$y=2x-1$

4

$y=2x+9$

17

The data has

association.

Show answer

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