Study Guide 5.2 b

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A
• B
• C
• D

The outlier "C" is not included in the data set. If "C" is included in the data set what would happen to the line of best fit?

• increase

• stay the same

• move down

• nothing

This graph compares data about car accidents with the ages of drivers.

What is the relationship between the variables?

• As the driver age increases, the number of accidents decreases

• As the driver age increases, the number of accidents increases

• There is no relationship between driver age and the number of accidents.

The graph shows a scatterplot, along with the best fit line without the outlier. If the outlier was added the line of best fit would...

• increase

• decrease

• stay the same

• move up

In the function y = 2.75x + 4, y represents the charge to rent a gold club and x represents the buckets of golf balls. How much will the price increase for every bucket of golf balls purchased?

• $2.75

• $4

• $6.75

• $2.40

You are saving money for college tuition. You deposit $200 into a savings account. The savings plan is modeled by the following equation: y = 100x + 200.

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

• the amount that is added each month

• the total value of the account

• the amount initially deposited (starting amount)

• the most amount you can save

You are saving money for college tuition. You deposit $200 into a savings account. The savings plan is modeled by the following equation: y = 100x + 200.

What does the slope of the linear model represent?

Mark all correct answers.

• the amount that is added each month

• the change in the dependent variable in relation to the independent variable

• the amount initially deposited (starting amount)

• the most amount you can save

The y-intercept represents the base price of (a)   for the robot to travel to a house. The slope represents a cost of ​ (b)   cents per hour worked. If the base cost for the robot changed to $10 and the cost per hour is unchanged, the new equation would be ​ (c)   .

• 8
• 50
• y=.50x + 10
• y=.50x+8

Match the graph with its correlation coefficient.

a

b

c

d

0.80

-0.90

0.90

-0.70

The scatterplots show the number of items sold at a specific price for each store. If the owner wants to sell a new type of saw for $100, at which store should the owner sell the saw?

• Store #1 because it is closest to his house.

• Store #1 because it sells more $100 items.

• Store #2 because it makes more money.

• Store #2 because it sells more $100 items.