CFA 7&8 Review

Each box contains 6 pens as shown in the table.

Which list includes only independent quantities?

• A) 1, 2, 3, 4

• B) 2, 4, 6, 8

• C) 1, 2, 6, 12

• D) 6, 12, 18, 24

There are twice as many chocolate donuts as strawberry donuts on a tray. If C stands for the number of chocolate donuts and S stands for the number of strawberry donuts, which equation describes this relationship?

• S = 2C

• C = 2S

• S + 2 = C

• C + 2 = S

Adult lizards of a certain breed weigh an average of 5.2 times what they weigh at birth. Which represents the weight of an adult lizard, w, that weighed b grams at birth?

• w = 5.2 + b

• w = 5.2 × b

• w = 5.2/b

• w = b/5.2

Does this graph shows a nonlinear relationship?

• True

• False

• Sometimes

• No, this is a lie detector test.

Which graph represents a linear function?

• Top graph

• None of the graphs

• Bottom graph

• Both graphs

The height, in feet, of a child at different ages, in years, is shown

Which graph represents the line of best fit?

• 
• 
• 
• 

The scatterplot below shows the hand spans, in inches, of several children from the ages of 1 through 12. Based on the line of best fit for the data shown on the graph, what is the predicted age, in years, for a child who has a hand span of 7 inches?

• 5 years

• 7 years

• 9 years

• 11 years

According to this graph, which statement best describes the activity in Jan’s account between weeks 5 and 7?

• The account balance increased steadily.

• The account balance decreased steadily.

• The account balance remained constant.

• The account balance fluctuated.

Jan started a savings account with a $5 deposit. She made several more deposits and no withdrawls over the next 12 weeks. The graph to the left shows the total amount in her account each week. According to the graph, which statement best describes Jan's account between weeks 5 and 7?

• Jan did not make a deposit.

• Jan made a total of a $5 deposit.

• Jan made a total of a $10 deposit.

• Jan won the lottery.