Math 1 Unit 2 Test - Remix

What is the equation of a line that has a slope of 2 and a y-intercept of -7?

• y = 2x - 7

• y = 2x + 7

• y = -7x + 2

• y = 7x - 2

Which of the following correctly describes the graph of y = −1/2x + 3?

• The graph of this equation has a positive slope and a positive y-intercept.

• The graph of this equation has a positive slope and a negative y-intercept.

• The graph of this equation has a negative slope and a negative y-intercept.

• The graph of this equation has a negative slope and a positive y-intercept.

Find the equation in point-slope form of a line that has a slope of 1/2 and goes through the point (−4, 1).

• y = 1/2x - 4

• y = 1/2(x + 4) + 1

• y = 1/2(x + 4) - 1

• y = 1/2(x - 4) + 1

Find the equation of a line that goes through the points (8, −9) and (−4, 15).

• y = -2(x + 4) + 15

• y = -2 (x + 8) - 9

• y = -1/2(x + 4) + 15

• y = -1/2 (x - 8) - 9

Find the equation of the line that has a slope of zero and passes through the point (−2, 5)

• y = 5

• x = -2

• y = -2

• x = 5

For a few months, Dexter recorded the number of fluid ounces of laundry detergent remaining (y) after his family washed (x) loads of laundry. The equation is y = −1.6x + 50. Which statement correctly describes this situation?

• The number of ounces left in the laundry detergent bottle increases linearly.

• The number of ounces left in the laundry detergent bottle decreases linearly.

• The number of ounces left in the laundry detergent bottle increases exponentially.

• The number of ounces left in the laundry detergent bottle decreases exponentially.

When most American's throw away their laundry detergent bottle it has about 1/2 of an ounce of detergent left in it. If you use Dexter's equation y = −1.6x + 50 and Mya's equation for her laundry detergent, which is y = 50(0.75)^x, who will throw away their laundry detergent bottle first?

HINT: Make a table or graph

• Dexter and it will take about 31 loads of laundry

• Dexter and it will take about 50 loads of laundry

• Mya and it will take about 16 loads of laundry

• Mya and it will take about 22 loads of laundry

Which equation is correct for the graph?

• y = 1/3x + 2

• y = -3x - 2

• y = 1/3x - 6

• y = 3x - 6

Which of the following situations would be considered discrete?

• For every hour that passes, the amount of bacteria increases by 15%.

• The water in a swimming pool steadily decreases by 12 gallons per minute.

• The population of Wake Forest is growing by 2.7% each year.

• Jeremy is saving for a new video game. He has $10 and saves $10 a month.

Simplify (7a⁴)²

• 49a⁸

• 14a⁶

• 49a⁶

• 14a⁸