Minnesota MCA in High School Math Chapter 7

DOK: 2
1 pt

1.

The function *y*=0.1*x*+84 is being used to model the average life span of males in years as a function of the number of years from now. Which of the following future events would most likely make some of the mathematical model’s predications inaccurate?

A

a cure for the common cold

B

advances in laser eye surgery

C

a cure for gum disease

D

lee exercise and more calories consumed by the average male over time

**Use the information given to answer questions 4-5.**

Coach Todd wanted to know if there is a relationship between the number of baskets scored in a basketball game and the height of the players. After the season was over, he collected data from the games and formed the following scatter plot.

DOK: 2
1 pt

4.

Which best describes the linear correlation between the height of the basketball player and the amount of points scored in a game?

A

strong positive correlation

B

weak positive correlation

C

strong negative correlation

D

no correlation

DOK: 3
1 pt

7.

Which of the following situations can be modeled with an exponential function?

A

Corey pays $410 a month for rent.

B

Brittany's income triples every 10 years.

C

Ralph gets paid $150 an hour.

D

Jessica notices a constant change in temperature of her coffee with every minute that passes.

DOK: 2
1 pt

9.

Heather and Robert each used eyeballing to determine the equation to model the data shown. What of the following statements in true?

A

Their equations will likely be the same because their data is the same.

B

Their equations will likely be the same because the *y*-intercept of the mathematical model will obviously be 0.

C

Their equations will likely be different because eyeballing is only an approximation.

D

Their equations will only be different if one of them makes an error.

DOK: 3
1 pt

10.

Which of the following relationships is most likely one of causation?

A

As the water temperature of a pond increases, the number of fish in the pond decreases.

B

As the number of visits to a news website increases, the number of people evacuating a city increases.

C

As credit-card usage increases, the unemployment rate increases.

D

As the number of people snowboarding increases, the number of snowmen built increases.