Prealgebra Functions

• Function 1 has a greater rate of change than function 2

• Function 2 has a greater rate of change than function 1

• Function 1 has a greater y-intercept than function 2

• Function 2 has a greater y-intercept than function 1

Jenny and Ahmed have part time jobs. The amount Ahmed earns is represented in the table. The amount that Jenny earns is represented by the equation y=9.5x, where x is the number of hours worked and y is the total pay. Choose all that are true

• Jenny earns more than Ahmed per hour

• Jenny earns less than Ahmed per hour

• Jenny earns $9.50 each hour

• Ahmed earns $8.25 each hour

How could you graph the equation y = -\frac{1}{2}x-6

• Use -6 as the y-intercept and find the next point by going down 1 in the y direction and over 2 in the x direction

• Use the equation to find the x and y intercepts and draw a line 

• Use the equation and plug in different numbers for x to find the corresponding y value.  Plot the ordered pairs on the line.

• Start at -1/2 on the y-axis and go down 6 in the y direction and over 1 in the x direction to find the next point. 

What is the equation of the line?

Uber charges of fee of $5 for a car ride, plus a charge of $0.50 for each mile driven. Lyft charges a fee of $10 for a car ride, plus a charge of $0.10 for each mile driven. For what number of miles driven will the cost of a cab ride be the same for both companies?

Which relation is displayed in the table?

• <(3, 3), (7, 3), (8, 5), (0, 9)>

• <(3, 3), (3, 7), (5, 8), (9, 0)>

• <(3, 3), (7, 3), (5,8), (9,0)>

• The functions have the same y-intercept

• The functions have a positive slope

• The functions have the same slope

• The functions are both linear

• Each charm costs $15

• Each charm costs $40

• A bracelet without any charms costs $25

• A bracelet without any charms costs $0

Which relation is a function?

• {(1, 2), (2, 3), (3, 4), (4, 5)}

• {(0, 2), (0, 4), (0, 6), (0, 8)}

• {(1, 2), (2, 1), (1, 3), (3, 1)}

• {(1, 2), (2, 3), (3, 4), (1,6)}

Tally needs $175 to pay for a new tablet. She already has $55 saved. She earns $24 a week babysitting. When will she have enough money saved for the tablet?

• 4 weeks

• 5 weeks

• 24 weeks

• 55 weeks