Vocabulary
Functions
Writing LINEAR Functions
Comparing Functions
Qualitative Graphs
100

the x values of a function

What is the domain

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?  g(r) or h(r)?


h(r)

y-int =8

g(r)

y-int=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

What is the range

200

Is this a function:


Yes!  Each input is paired with only 1 output.

200

A company charges a membership fee of $100 plus a monthly fee of $25. Write a function to represent this relationship.

What is y= 25x + 100

200



They are increasing at the same rate 3/4.

200

During which section of the graph was the person traveling the slowest?

A is the least steep.

300

relation in which every member of the domain is paired with one member of the range

What is a function

300

Is this a function:

NO!  Fails the verticle 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

300

Which has a smaller rate of change the equation or the graph?


The equation has a smaller rate of change 5/4 compared to 2

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

What is linear function

400

Is the following graph a function?


Yes!  A verticle line will only pass through at 1 point!

400

I have 119 pages of a book left to read.  If I read 20 pages per day I will meet my goal of finishing the book on time.  Write a function to describe y (total pages left to read) and x, number of days.

What is y=-20x+119

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

functions whose rate of change are not constant so therefore their graphs are not straight lines

What is a nonlinear function

500

If the following graph 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 108.5-101.75/ 6-4.5 = 4.5 pounds)

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

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