Function Math
Function Word Problems
Review from Other Units
Ms. Tirpak Trivia
100
(3, 4) (5, 8) (9, 10) (7, 6) (____, ____)
What could go in the blanks that would make it a function?
What could go in the blanks that would make it NOT a function?
(8, 10): anything that has an x that is not 3, 5, 9 or 7
(7, 2): anything that has an x that is 3, 5, 9 or 7
If x's repeat, it is NOT A function!
100
(3, 4) (5, 8) (9, 10) (7, 6)
What is the domain?
What is the range?
Domain: 3, 5, 7, 9 all xs smallest to biggest
Range: 4, 6, 8, 10 all ys smallest to biggest
100
What is the secret formula when you have a scatterplot and you are trying to find the line of best fit?
y1 ~ mx1 + b
100
What color is my extremely stylish Kia Soul?
black
200
f(x) = 3x + 5
What is f(4)?
f(4) = 3(4) + 5 = 17
200
Here is a graph of f(x). For what values of x is f(x) = 4?
a. x = 0 b. x = 2 c. x = 2 and -2 d. x = 4
c. x = 2 and - 2
At y = 4, the graph hits the line twice! At 2 and -2 for x.
200
What is the slope and y-intercept of this equation?
y = -5x + 10
slope: -5
y-intercept: 10
200
What sibling am I?
Oldest
Middle
Youngest
Only
Oldest
300
f(x) = 3x + 5
What is f(0.01)?
3(0.01) + 5 = 5.03
300
I went to the store and bought 20 oranges for $15 dollars.
What is independent: # of oranges or cost?
What is dependent: # of oranges or cost?
Cost is dependent on number of oranges.
Number of oranges does not depend on the cost.
300
Solve this system:
2x + 4y = 8
4x + 8y = 16
Infinite Solutions!
300
What is my middle name?
Elizabeth
400
Which function has the biggest output when x = 7?
f(x) = 3x + 2
g(x) = 10x - 100
h(x)=(10x)/2
h(x)
f(x) = 23
g(x) = - 30
h(x) = 35
400
I want to watch more TV. Netflix (function N) costs $25 a month no matter what. Amazon Prime (function A) costs $10 a month plus $2 for every movie I want to watch.
What does A(3) = 16 mean?
I watch 3 movies on Amazon Prime and it costs me $16 total.
400
Which inequality matches this expression:
Jerel has at least $25 in his wallet.
a. x < 25
b. x > 25
c. x>=25
d. x <=25
c. x >=25 he has 25 or MORE dollars
400
What is my favorite flavor of icecream?
Birthday cake
500
f(x) = 20x + 5
What is x when f(x) = 85?
20x + 5 = 85
Solve it and x= 4
500
I want to watch more movies. Netflix (function N) costs $25 a month no matter what. Amazon Prime (function A) costs $10 a month plus $2 for every movie I want to watch.
Which plan is cheaper if I want to watch ten movies this month?
Netflix = $25
Amazon = $10 + $2(10) = $30
Netflix is cheaper if I want to watch 10 movies.
500
I have an app, I can plug in a date and it gives me who has a birthday that day.
Is this a function?
NO! Multiple people can have the same birthday so the days would go to multiple people.
500
Where did I go to college and what sport did I play in college?
Mercer and Track
600
g(x) = x3+4x2+5x-1
h(x) = 2x3 - 10
k(x) = -2x + 10
Find k(5)
-2(5) + 10 = 0
k(5) = 0
600
Josie will work at a pool this summer, maybe. The function A gives her earnings after h hours. Which equation tells us that Josie earned $45 for working at the pool for 3 hours?
a. A(45) = 3 b. A(3) = 15
c. A(15) = 3 d. A(3) = 45
d. A(3) = 45
If Josie works 3 hours, she makes $45.
Time is input! Money is output!
600
Is (-5, 10) a solution to this equation?
2x + 8y = 90
NO!
2(-5) + 8(10) = 70
600
Where was I born?
a. Russia
b. South Carolina
c. Michigan
d. Tennessee
c. Michigan