Unit 1 Linear Models Test Review

Which equation could represent the relationship shown in the scatter plot?

• y = 7/8x + 6

• y = 5x + 1

• y = −2x + 12

• y = 2/3x − 7

Tags

CCSS.8.EE.B.5

Which statement correctly describe the data shown in the scatter plot?

• The scatter plot shows a negative association.

• The scatter plot shows a nonlinear association.

• The point (16, 4) is an outlier.

• The scatter plot shows no association.

The scatter plot shows the length of a spring, in inches, when a stretch force, in pounds, is applied. The equation represents the linear model for this data.

y = 0.73x + 1

What does the number 0.73 in the equation mean in this context?

• The spring will stretch 0.73 inch for every pound of force applied.

• The spring has a length of 0.73 inch when no force is applied.

• The spring stretches a distance of 1 inch when a force of 0.73 pound is applied.

• The spring has no stretch when a force of 0.73 pound is applied.

Tags

CCSS.HSF.LE.B.5

A store offers some customers a coupon and then counts how many customers return to the store to shop again. The two-way table shows the results of this experiment. Does there appear to be an association between whether a customer received a coupon and the customer's tendency to return to the store to shop again?

• Yes there DOES appear to be an association

• No there does NOT appear to be an association.

• There is not enough information to tell.

The scatter plot shows the systolic blood pressure of people of several different ages. The equation represents the linear model for this data.

 

y = x + 95

 

According to the model, what is the systolic blood pressure of a newborn?

• 0 mm Hg

• 55 mm Hg

• 95 mm Hg

• 110 mm Hg

What goes in box 4?

• 1

• 2

• 3

• 0

Consider the two-way table. What is the relative frequency of Category A in first column?

• 0.33

• 0.25

• 0.50

• 0.75

This table shows the number of bathrooms in some selected houses and apartments. oF the apartments, about what percent has 1 bathroom?

• 80%

• 71%

• 29%

• 65%

A new law has support from some Democrats and some Republicans. This two-way frequency table shows the proportion from each political party that does or does not support the new law.

Which conclusion can be made from this table?

• Among Democrats, a larger percentage do not support the law than support the law.

• Compared to the Republicans, the Democrats have a larger percentage of members who support the law.

• More Republicans support than the law than do not support the law.