Does This Line Fit the Function

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Tags

CCSS.8.EE.B.5

John plotted points on a graph to see if there was a relationship. Then he drew a line of best fit based on the fact that his line went through the most points possible.

Decide whether which statements are False.

• John's line of best fit is correct.

• John's line of best fit should be higher to be closer to all of the points.

• John's line of best fit should be lower so that it will go through more points.

Tags

CCSS.8.EE.B.5

Is this function linear or nonlinear?

• Linear

• Nonlinear

Tags

CCSS.8.F.A.3

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

Does the graph represent a function?

• Yes, because the vertical line test shows there are no repeating input values

• No, because the vertical line test shows there are repeating input values

The relation is a ​ (a)   because ​ (b)   .

• function

• no x-values repeat

• non-function

• x-values repeat

• no y-values repeat

• y-values repeat

Tags

CCSS.8.F.A.1

Does the graph represent a function?

• Yes, because the vertical line test shows there are no repeating input values

• No, because the vertical line test shows there are repeating input values

Tags

CCSS.8.F.A.1

A: ​ (a)  

B: ​ (b)  

• Not a function

• Function

Tags

CCSS.8.F.A.1

Function or not? (a)  

Domain =​ (b)  

Range =​ (c)  

• Function

• Not a Function

• {-5, -2,  2}

• {-4, 1. 3}

Answer explanation

The relation is not a function because it assigns multiple outputs to at least one input. The domain is {-5, -2, 2} and the range is {-4, 1, 3}, confirming the correct choices.

Tags

CCSS.8.F.A.1

The two ordered pairs that make this mapping NOT a function is ​ (a)   and ​ (b)   .

• (50, 10)

• (50, 20)

• (25, 20)

• (75, 30)

• (100, 30)

Tags

8.5.G