Unit 2 Review

A line and a right triangle are shown in the graph below. What is the equation of the line?

• y = 4/7x

• y = 7x + 4

• y = 4x + 7

• y = 7/4x

Alyssa is learning to drive her parents' car. - She increases her speed for 20 seconds. - She slows down for 10 seconds. - She stays approximately the same speed for the next 20 seconds. - She then slows down to a stop over the last 5 seconds. Select the graph that BEST represents Alyssa's speed over time.

• 
• 
• 
• 

Anna buys trees from a nursery that cost $5.95 each. She has a maximum of $40 to spend on her tree purchases. The total cost, with respect to the number of trees purchased, can be modeled by a function. Select the statement that correctly describes the domain of the function.

• The domain is the set of all integers greater than or equal to 0 and less than or equal to 6.

• The domain is the set of all integers greater than or equal to 0 and less than or equal to 7.

• The domain is the set of all real numbers greater than or equal to 0 and less than or equal to 35.7.

• The domain is the set of all real numbers greater than or equal to 0 and less than or equal to 40.

Which of these functions has a greater rate of change than the function graphed below, and why?

• y = 2x + 12, because the rate of change of the graphed function is 3

• y = 2x + 12, because the rate of change of the graphed function is 9

• y = 10x + 1, because the rate of change of the graphed function is 3

• y = 10x + 1, because the rate of change of the graphed function is 9

Three functions are shown.

What is the correct order for y-intercept least to greatest?

• Function 1

  Function 2

  Function 3

• Function 2

  Function 3

  Function 1

• Function 3

  Function 2

  Function 1

• Function 1

  Function 3

  Function 2

A taxi cab company charges $8.00 per ride plus $0.75 for each mile driven. Which equation models the total cost (c), in dollars, of a taxi cab ride, where m is the number of miles driven?

• c = 8m + 0.75

• c = 8.75m + 0.75

• c = 0.75m + 8

• c = 0.75m + 8.75

In Algebra class, Ms. Smith gave each of her students a set of equations. There are linear and non-linear equations.

Select the equations that are linear.

• 3x + 4y = 12

• y = 1/2x + 6

• y = 4x²

• y + 2 = |x|

• y + 6 = 4x

Ana purchased a used car with 35,500 miles on it. After 4 years of driving, the car has 90,300 miles on it. Move the numbers into the boxes to write a linear equation to show the approximate number of miles (y) that the car will have on it x years after Ana purchased it.

Which of the following statements explains why the set of ordered pairs does NOT define a function? {(0, 1), (-2, 3), (4, 1), (0, 5), (6, 6)}

• Some ordered pairs use the same x value with different y values.

• Some ordered pairs use the same y value with different x values.

• Some ordered pairs use x and y values of different signs.

• Some ordered pairs use the same number for both the x and y values.

Natasha got a raise on her hourly wage, and the graph shows the amount of money she has made this year since her rate of pay was increased. Which of these statements must be correct based on the graph?

• Before her raise, Natasha made $12.50 an hour.

• Before her raise, Natasha made $25.00 an hour.

• After her raise, Natasha makes $12.50 an hour.

• After her raise, Natasha makes $25.00 an hour.