A106B- Scatter Plots and Trend Lines

A teacher surveyed his students on the # of hours they spent studying for the final exam (out of 20 points,) and their grades. The graph below shows the result of the survey.

A106B_1

What type of correlation is shown?

Positive correlation

Negative correlation

Parallel correlation

No correlation

Question 1 of 8

Based on the results previously, if a student taking a make-up test studied for 4 hours, what score is she expected to receive?

10

20

16

12

Question 2 of 8

Is the type of correlation presented below due to causation?

Milk prices rising as gas prices rise.

Yes

No

Question 3 of 8

Sam has to write the equation of the line of best fit for the graph below. What should he do first?

A106B_3

Connect the points

Find the slope between (3,5) and (5,8)

Decide which two points give the most representative straight line.

Fine slope between (1,2) and (1,4)

Question 4 of 8

The graph below shows the population trends of the American Crocodile from 2000-2005 after intervention from wildlife help organizations.

A106_4

About how many crocodiles were there in 1999 assuming that the trend was constant?

2,000

1,500

500

1,000

Question 5 of 8

If the trend continues, about how many crocodiles will there be in 2006?

6,000

4,000

5,000

4,500

Question 6 of 8

Anne went to the mall on Black Friday, and recorded her total money spent for 8 hours. Her data is shown in the graph below.

A106_6

If the trend continues, how much would she have spent if she shopped for another hour?

$250

$225

$240

$230

Question 7 of 8

Which table best depicts the data presented on the scatter plot?

Question 8 of 8