Semester 1 Review Part 2 ALGEBRA ONLY

Estimate the correlation coefficient for this scatterplot.

• A) r = -0.9

• B) r = 1

• C) r = 0.9

• D) r = -1

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What type of correlation does this graph show?

• A) Positive

• B) negative

• C) none

• D) all of the above

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

Estimate the correlation coefficient

• r = 1

• r = -1

• r ≈ -0.8

• r ≈ 0.8

• r ≈ -0.5

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

A perfect positive correlation has a correlation coefficient of ____. 

• 1
• -1
• 0

Tags

CCSS.HSF-LE.A.1B

Average time spent listening to music per day and average time spent watching TV per day.  $r=-.17$  

• strong positive

• strong negative

• weak positive

• weak negative

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

As x increases, y decreases.

• A) no correlation

• B) negative correlation

• C) correlation coefficient

• D) positive correlation

Tags

CCSS.HSF-LE.A.1B

Find the equation of the line of best fit for this table.

• y = -0.18x + 6.47
• y = 6.47x - 0.18
• y = 0.04x - 0.19
• y = -0.18x - 0.19

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• A) The more books students read, the lower their English grade.

• B) The more books students read, the higher their English grade.

• C) The fewer books students read, the higher their English grade.

• D) No relationship exists between the number of books students read and their English grades.

Tags

CCSS.HSF.LE.B.5

Find the x and y intercepts
4x - 5y = 40

• x intercept is 10 
  y intercept is 8
• x intercept is 10
  y intercept is 20
• x intercept is 8
  y intercept is 10
• x intercept is 10
  y intercept is -8

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

Which equation matches the graph? (Click me to see the image)

• y = 2x + 2
• y = 1/4x + 2
• y = 1x + 4
• y = 4x + 2

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSF.IF.C.7

CCSS.HSS.ID.C.7