EOC Review Warm-up #1: Applying Linear Functions

Zoreen graphed the line shown. Which of the following repreents the equation and slope of the line?

• y = -7; slope = -7

• x = -7; slope = 0

• x = -7; slope is undefined

• y = -7; slope = 0

Which of the described situations is an example of causation?

• A only

• B only

• A and B

• B and C

A group of adults 30-40 years old were asked how many hours they work in a week and their average systolic blood pressure. The results are shown in the table. What does the correlation coefficient for the data indicate about the strength of the association between the number of hours a person works in a week and their blood pressure?

• Strong negative association

• Strong positive association

• Weak negative association

• Weak positive association

A group of adults 30-40 years old were asked how many hours they work in a week and their average systolic blood pressure. The results are shown in the table. What is the best prediction of a person's blood pressure if he or she worked 32 hours a week?

• 97

• 140

• 130

• 125

The number of links on a cable chain is DIRECTLY PROPORTIONAL to the length of the chain. If 25 links create a chain that is 21.25 inches long, then how many links are in a chain that is 80.75 inches long?

• 68.6

• 69

• 95

• 100