Identifying Functions
Describing Functions
Let statements
Equations
Word Problems
100
Is this relationship a function?
yes, this is a function because every input has one output.
100
What is the rate of change?
60
100
Define the x and y variables.
let x = the number of hours
let y = the cost
100
y=25x+50
100
Nicole will earn $28 babysitting.
200
Is this relationship a function?
No, this is not a function because an input of 8 has outputs of 21 and 34.
200
What is the slope and y-intercept?
m=-1/2 and b=1
200
Define the x and y variables.
let x = the number of days
let y = the height of the plant
200
y=1.5x+5
200
The plumber will earn $425.
300
Is this relationship a function?
No, this is not a function because an input of 70 has two outputs.
300
What is the slope and y-intercept?
m=3 and b=-4
300
Define the x and y variables.
let x = the number of seconds
let y = the plane's altitude
300
y=-5x+8500
300
There is 255 gallons of water in the tank.
400
Is this relationship a function?
yes, this is a function because every input has one output.
400
Who types faster? Justify your answer!!
Morgan types 15 words per minute.
Brian types 20 words per minute.
Brian types faster than Morgan.
400
Define the x and y variables.
let x = the number of months
let y = the cost of internet service
400
y=18x+45
400
It costs $200 to rent the canoe for 6 hours.
500
Is this relationship a function?
No, this is not a function because an input of 4 has outputs of 2 and -2.
500
Which plan is cheaper if a student needs to be tutored for 6 hours?
Plan 2
500
Define the x and y variables.
let x = the number of months
let y = the cost of the gym membership
500
y=33x+30
500
Attorney A charges $4,150 for 26 hours.
Attorney B charges $4,700 for 26 hours.
Attorney A has the better price.