Vocabulary
Functions
Writing LINEAR Functions
Comparing Functions
Analyzing Graphs
100
The x values of a function are called the:
input or output
What are the inputs?
100
Is it a function:
NO! a has two different outputs
100
The store charges $2.50 PER cup of coffee. Write a function for this situation. Use y to represent cost and x to represent cups of coffee.
What is y = 2.50x
100
Which has a greater initial value? The function expressed in the equation or the one shown in the table?
what is the function in the table?
table: y-int =8. (0,8)
equation: y-int=7. (0,7)
100
On the journey depicted below, how many times did the person stop?
Two times during B and D
200
The y values of a function are called the :
input or output
What are the outputs?
200
Is this a function:
Yes! Each input is paired with only 1 output.
200
A company charges an initial membership fee of $100 plus a $25 fee per month. Write a function to represent this relationship.
What is y= 25x + 100. or y=100 +25x
200
They are increasing at the same rate 3/4 or 0.75.
200
During which section of the graph was the person traveling the slowest?
Section A, because it is the least steep.
300
A relation in which every input has exactly one output is called a _________.
What is a function
300
Is this a function:
NO! Fails the vertical line test.
300
Aly charges $25 to babysit plus $8 PER hour. Write a function to model her total charge, y, for hours, x.
What is y=8x+25 or y=25 +8x
300
Which has a smaller rate of change the equation or the graph?
The equation has a smaller rate of change 5/4 or 1.25, compared to the rate of change of 2 on the graph.
300
According to the graph below,
A. The car is stopped
B. The car is increasing in speed
C. The car is traveling at a constant speed
C
400
A function, that when graphed is a line, is called a _______ ________.
What is linear function
400
Is the following graph a function?
Yes! A vertical line will only pass through at 1 point!
400
I have $120 in my checking account. If I deduct $20 PER day, how many days until I have no more money? Write a function to describe y (total amount of money after each deduction) and x, number of days.
What is y=-20x+120 or y=120-20x
400
Which has a higher rate of change? Function G or F?
F is higher the rate is 4
G has a rate of 3.5
400
How many seconds did it take the car to reach its maximum speed?
7 seconds
500
A function whose rate of change is not constant so therefore their graphs are not straight lines are called a ________ _______.
What is a nonlinear function
500
Is the following graph a function:
NO! when x=0 there are two different y values.
500
Jackson pays $28 each month for phone service and he paid a one-time activation fee of 100. Write an equation to represent the cost, c, for m, months of service.
c=28m+100
500
Which wrestler is gaining weight faster?
Wrestler A gains 5 pounds per month
Wrestler B gains 4.5 pounds per month
500
From the graph below you can determine:
A. a person was returning home
B. a car was speeding
C. a person was slowing down.
C