Function or not
Compare Functions
Linear or not?
Function Equations
100
Does the following set of ordered pairs represent a function or not?
(-1,2) (0,1) (1,1) (2,0)
Yes
100
Which function has the greater rate of change?
y=4x+2
y=2x+4
y=4x+2
100
Which of the following functions are linear?
A. y = x2 + 2
B. 2x2 + y2 = 5
C. y = 2/x
D. y= 15 - 0.5x
D
100
Write an equation in slope-intercept form to describe the relationship between time and water shown below.
Time (min.) Water (gallons)
0 2
1 5
2 8
y = 3x + 2
200
Which of the following graphs do NOT represent a function?
1 2 3
Graph 3
200
Phone company A charges $10 a month and $0.25 per minute per phone call. Company B charges $50 per month, and unlimited calls. Which company has a greater slope?
Company A
200
Does the relationship below represent a linear function?
Hours (x) Money Earned (y)
1 28
2 56
3 84
4 112
Yes
200
Luna went to the school store to buy pencils. Luna bought 10 pencils for $12.50 . If Luna started with $20, write an equation to show the amount of money Luna will have left, y, after buying x amount of pencils.
y = -1.25x + 20
300
Which of the following tables do NOT represent x as a function of y?
B
300
Rose's flower shop charges $45 dollars per flower arrangement, and a $10 delivery fee. Joe's flower shop charges $47 dollars per flower arrangement and a $8 delivery fee. What is the difference in their y-intercepts?
2
300
Does the relationship below represent a linear function? If so, what is the rate of change?
Days (x) Inches (y)
0 5
2 9
3 11
5 15
Yes, 2
300
It costs $50 to rent a U-Haul truck for one day, including a one time service fee. It costs $130 to rent the truck for 5 days, including a one time service fee. Based on these two fees, what is the daily fee to rent a U-Haul truck?
$20
400
What value could replace t in the ordered pairs below in order to NOT make this relation a function?
(1,8) (t,10) (4,12) (7,15)
1,4, or 7
400
Which function below has the smallest slope?
12x + 2y = 7
y = 2x + 10
12x + 2y = 7
400
What is the y-intercept of all proportional functions?
0
400
The BEST and MOST descriptive answer will get ALL the points!!!!!!!
Given the equation y = x -2 , describe what this would look like on a graph. Include the slope, y-intercept, and whether it is a straight or curved line.
Slope: +1 , count up 1 and over 1
Y-Intercept: -2 , the line crosses the y-axis at -2
Straight Line
500
Which of the following input, output pairs could NOT be represented with a function?
1. A street name maps to a house number.
2. A state maps to its state capital.
3. A phone number maps to a cell phone.
3. The amount of hours worked maps to the amount of money earned.
1. A street name maps to a house number.
500
Ms. White's donut shop has a special this weekend for $1.50 per donut, and a $5 packing fee. Normally, Ms. White sells 2 donuts for $9, 4 donuts for $13, 6 donuts for $17, and so on. If her packing fee does not change, how much will each donut be discounted?
$0.50 each
500
How could you change the equation below to make this a linear function?
y = 2x2 + 5
Remove the exponent on x
500
Terry is running along a path, and starts at mile 2. In 30 minutes, Terry is at mile 5. Write an equation to represent the mile, y, Terry will be at after x amount of minutes.
y = 0.1x + 2 or y = 1/10 x + 2