Algebra OST Review

What is the correlation coefficient of the data points given in the graph?

• r = 1

• r = -1

• r = 0

• r = 0.5

What is the correlation coefficient of the data points given in the graph?

• r = 1

• r = -1

• r = 0

• r = -0.5

What percentage of people surveyed are female and drive a sports car?

• 0%

• 54%

• 19%

• 25%

How many people purchased no food and no drink?

• 60

• 10

• 20

• 200

What percent of the total population surveyed were electrical engineers that like math?

• 33.9%

• 48.6%

• 16.5%

• 21.7%

What percent of people surveyed play an instrument and play a team sport?

• 80%

• 40%

• 73%

• 90.1%

To prepare for a road trip, Jill filled up her 19-gallon tank. She estimates that her SUV will use about three gallons per hour. Write an equation to model the amount of gasoline, G, remaining in her tank after t hours.

• G = 19 – 3t

• G = 19 + 3t

• G = 3 - 19t

• G = 3 + 19t

Mike started a summer business of mowing lawns. However, before he could mow lawns, he needed to purchase supplies (a lawnmower among other needs). Mike spent $395 gathering necessary materials. He makes on average $60 per lawn, mowed. Write an equation to show Mike his earnings for L lawns mowed.

• m = 60L - 395

• m = 60L + 395

• m = 60 - 395L

• m = 60 + 395L

Yvette has a home-based business putting on children's parties. She charges $55 to design the party and then $4 per child. Write an equation that relates the total cost of the party to the number of children n.

• C = 4 + 55n

• C = 4 - 55n

• C = 4n - 55

• C = 55 + 4n

Write a system of inequalities:

Carlos works at a movie theater selling tickets. The theater has 300 seats and charges $7.50 for adults and $5.50 for children. The theater expects to make at least $2000 for each showing

• x + y ≤ 300

  7.5x + 5.5y ≥ 2000

• x + y < 300

  7.5x + 5.5y ≥ 2000

• x + y ≤ 300

  7.5x + 5.5y ≤ 2000

• x + y > 2000

  7.5x + 5.5y ≤ 300