Functions
Is this a function?
(2,4) (3,4) (5,6) (12,14)
yes
Given function y = 4x+3 what is the slope?
4
Given function y = -2x+8 what is the y-intercept?
8
Using your calculator, graph the following two equations and give it's solution.
y=1/3x+3
y=2x-2
(3,4)
Jackie pays $30 for a parking pass to the Super Bowl and purchases tickets (x) for $250 each. Write an equation to represent the total spent.
y = $30 + $250x
y = $250x + $30
Is the following a function?
(2,3) (3,4) (3,5) (5,3)
No
Given function y = 1/4x+3 what is the slope?
1/4
Given function y = 1/5x-1 what is the y-intercept?
-1
Using your calculator, graph the following two equations and give it's solution.
y=-6x-3
y=-x+2
(-1,3)
Jimmie has 200 cards and wins 15 cards per game (x). Write an equation to represent the total cards (y) Jimmie has.
y = 200 + 15x
y = 15x + 200
What is a linear function?
A function that is also a straight line.
Given function y = 5-x what is the slope?
-1
Given function y = 7-x what is the y-intercept?
7
Using your calculator, graph the following two equations and give it's solution.
y=-2/3x+3
y=-2/3x-4
No solution
The New England Patriots scored 13 points in the first half and score 10 points each of the quarters (x) in the second half. Write an equation to represent the total points (y) scored by the Patriots.
y = 13 + 10x
y = 10x + 13
What makes a relation a function?
The x-values DO NOT REPEAT.
Given function y =5 what is the slope?
0
What is the y-intercept for the following?
(-3,1) (-2,2) (-1, 3) (0,4)
4
Using your calculator, graph the following two equations and give it's solution.
y=-7x-3
y=4
(-1,4)
You’re going to the mall with your friends and you have $135 from your birthday. You buy jeans (x) for $35 each. Write an equation to show how much money (y) you have after you buy any number of jeans.
y = $135 - $35x
y = -$35 + $135
Is the following a function?
(1,2) (2,5) (3,10) (1,2)
Yes
What is the slope for the equation x=4?
Undefined or No slope
The y-intercept is the number where x is equal to what number?
0
Using your calculator, graph the following two equations and give it's solution.
y=-x + 2
y = 2 - x
Infinitely Many Solutions
You traveled 250 miles before you stop for gas. You then travel 60 miles per hour (x) until you reach Disney World. Write and equation to show the total distance (y) you traveled to Disney.
y = 250 + 60x
y = 60x + 250