Unit 2 Review Sep 21

You are going to pay for the cost of 6 t-shirts, minus $10 since you have a coupon.  Which of the following equations could be used to find the total amount you have to pay?

• y = 6x

• y = -6x +10

• y = 6x + 10

• y = 6x - 10

What is the equation of this line?

Hint* This is a horizontal line

• x = 3

• y = 3

• y = 0

• y = 3x

Jenny has a savings account at her bank. She had to deposit $25 to open the account, and now she is saving an additional $50 per week. Type the linear equation that represents this situation. Do not include extra spaces.

A plane is flying 7600 meters high.  It starts to go down at a rate of 4 meters per second.  

Write an equation modeling this situation. Do not include extra spaces.

Write the equation of this graph:

• y = -3x

• y = 3x

• y = 0

• y = 3x +1

Write the equation for the following graph.

The cost to rent a hotel room can be modeled by the function, C = 100+ 50n, where C is the total cost to rent the room and n is the number of nights you stay. What does the y-intercept represent in the context of the problem?

• the total cost to rent the hotel room

• The total nights you stayed

• the initial cost to rent a room

• the cost per night to rent the room

The function y =2x + 4 models the amount of money Katy charges per hour to wash x number of dogs.  What is the meaning of the slope of the function?

• The amount Katy charges per dog

• The cost for Katy to wash 0 dogs

• The amount katy charges per hour

• The fixed rate Katy charges

What is the slope and equation of the vertical line passing through (5,-2) ?

• The slope is 0 and the equation is y = 5

• The slope is undefined and the equation is y = 5

• The slope is undefined and the equation is x = 5

• The slope is -2/5 and the equation is x = 5

Which graph represents the inequality below?

y > 2x - 6

• 
• 
• 
•