MOY 8th Grade Mixed Review

In the graph, x represents time in seconds, and y represents the number of pages printed by a printer. Which statement best describes the rate of change for this situation?

• The number of pages printed increases 4 pages per second.

• The number of pages printed increases 2 pages per second.

• The number of pages printed increases 1 page per second.

• The number of pages printed increases 0.5 page per second.

Over the course of 10 years, how much more interest would Debra's $2,250 investment earn with a simple interest rate of 3.9% then with a simple interest rate of 2.7%?

• $1,485.00

• $270.00

• $877.50

• $27.00

Vanessa opens a savings account for college. She deposited $850.00 in an account with a simple interest rate of 3.6% How much interest would Vanessa earn after 6 years?

• $30.60

• $183.60

• $1050.94

• $200.94

Which of the following numbers would not fall between the points on the number line?

• 82%

• 1.63 x 10^-8

• -¾

• -0.25

The human retina contains cells called rods and cones that absorb light and change it to electric signals sent to the brain. There are approximately 120,000,000 rods and 6,000,000 cones in a retina. How is the number of rods in a human retina written using scientific notation?

• 12.0 x 10⁹

• 1.2 x 10⁷

• 1.2 x 10⁸

• 12.0 x 10⁷

Look at the graphs comparing the distances of traveling objects over time. Which statement is true for both graphs?

• Both graphs show a linear relationship because they are both decreasing

• Graph I shows a linear relationship that increases and then decreases, while Graph II shows a decreasing linear relationship.

• Graph II shows a decreasing linear relationship with a constant negative slope, while Graph I shows a non-linear relationship that increases then decreases.

• Neither graph shows a linear relationship.

The value of a certain stock in the stock market is tracked for several days. The information is presented in the graph. Which prediction can be made based on the data?

• On day 10, the stock should have a value of approximately $20.

• On day 12, the stock should have a value of approximately $23.

• On day 10, the stock should have a value of approximately $30.

• On day 12, the stock should have a value of approximately $36.

An animal shelter conducts an annual fundraising drive. The animal shelter must raise at least enough money to cover their annual rental of $2,500 and weekly expenses of $450. So far, the shelter has received a one-time donation of $125 and pledged donations of $680 per week, Which inequality can be used to find w, the number of weeks it can take the shelter to meet the goal?

• 125w + 680 ≤ 2,500w + 450

• 125w + 680 ≥ 2,500w + 450

• 680w + 125 ≤ 450w + 2,500

• 680w + 125 ≥ 450w + 2,500

Olivia and Stan are finishing their summer reading assignments for their ninth grade language arts class. The graph shows the linear relationship between the number of pages that each of them have left in their assigned reading and the number of days that they have taken to finish their assigned reading. On which day will Stan and Olivia have the same number of pages left to read?

• Day 9

• Day 30

• Day 12

• Day 18

Is the relationship in the scatterplot linear or non-linear?

• linear

• non-linear