CHECK IN #2 REVIEW

Which choice BEST describes the relationship between the variables shown in the graph?

• People who completed more years of college generally made less money than those

  who completed fewer years of college.

• There is no relationship between college completion and income.

• The annual income is the same regardless of the number of years of college

  completed

• People who made more money generally completed more years of college than

  those who made less money.

This shows a scatterplot.

Which equation best fits the data on the scatterplot?

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The scatter plot below shows the relationship between the number of hours spent

studying and the scores earned on driver’s license tests.

What conclusion does the scatter plot support?

• The two variables have a negative association.

• The two variables have a nonlinear association.

• The two variables have a positive association

• The two variables are not associated.

Which graph shows a linear association between two variables?

• 
• 
• 
• 

Which of these functions has a greater rate of change than the function graphed below,

and why?

• y = 2x + 12, because the rate of change of the graphed function is 3

• y = 2x + 12, because the rate of change of the graphed function is 9

• y = 10x + 1, because the rate of change of the graphed function is 3

• y = 10x + 1, because the rate of change of the graphed function is 9

  ABSS

Roberto made this scatter plot to show how the school record in the boys’ 400-meter run

has changed over time.

Roberto drew the line of best fit on the scatter plot. Which is the best interpretation of the

slope of the line of best fit?

• The current school record is about 46.5 seconds

• The school record has decreased at a rate of approximately 0.04 second per year.

• The school record has decreased at a rate of approximately 0.08 second per year.

• The current school record is about 50.5 seconds.

In this table, Nichole recorded the number of minutes she practiced her

trombone each week and the grade she received on her end-of-week

playing quiz.

Number of Minutes of Practice for the Week Playing Quiz Grade

0 65

45 86

90 92

100 98

Nichole determined the equation y = 0.30x + 67 best models the data.

What does the y-intercept in the equation of the linear model represent?

• If Nichole does not practice, she will receive an approximate grade of

  67 on her playing quiz.

• For each additional minute that Nichole practices, her grade will

  increase by about 0.30 point.

• If Nichole practices for 67 minutes, she will receive an approximate

  grade of 0 on her playing quiz.

• For each additional point that Nichole’s grade increases, she needs to

  practice an additional 0.30 minute.

The cost, y, in dollars, to purchase x school T-shirts includes a one-time

setup fee, plus a charge per T-shirt. The cost is modeled with the linear

function y = 6.67x + 35. What is the cost to purchase each T-shirt after

the beginning setup cost is paid?

• $41.67

• $35.00

• $28.33

• $6.67

This scatterplot shows the ages and heights of women.

Which equation would best fit the data?

• y = 6x + 56

• y = -x + 40

• y = x + 40

• y = -6x + 56

This scatterplot shows the population of gray wolves in an area since the

year 2000.

Using the best-fit linear model, what does the y-intercept represent?

• the population of gray wolves in 2000

• the population of gray wolves in 2010

• the average yearly decline of the gray wolf population

• the average yearly growth of the gray wolf population