Slopes and Intercepts
Tables and Graphing
Functions?
Real - Life functions
Grab-bag
100
What is the y-intercept of this graph?



1
100
Complete this table Table for the function: y = 4x - 3

x_|_y
0 | _
1 | _
2 | _


0 | -3
1 | 1
2 | 5
100


Linear Function, Nonlinear Function, or NOT a function?


NONLINEAR Function
100
Jimmy works at Best Buy and gets paid an hourly rate, and also gets paid a bonus.

If the equation y = 20x + 15 represents the amount of money he can earn for a week, then what does the variable y stand for ?


Amount of money $$$
100
y = 10x - 13

What is the y-intercept for this function equation?
-13

(NEGATIVE!)
200
Two lines are parallel if they have the same ______.
Slope

200
Complete this table Table for the function: y = -2x + 3

x_|_y
-2 | _
0 | _
2 | _
x_|_y
-2 | 7
0 | 3
2 | 1
200
The name of the method used to determine whether a graph is a function or not?


What is the Vertical Line Test

200
Jimmy works at Bestbuy and gets paid an hourly rate, and also gets paid a bonus.

If the equation y = 20x + 15 represents the amount of money he can earn for a week, then how much does he get paid per hour ?


$20
200
When graphing an equation that is in slope-intercept form,
(y=mx+b), where do you start?


With the b (y-intercept)
300
What is the slope of this line?

y = -x - 3


slope = -1
300
The method describing how you would draw a graph,

when given a table of values


What is plotting the points on a graph?
300
Linear Function, Nonlinear Function, or NOT a function?



NONLinear Function
300
Your Gym membership charges 20 dollars a month, plus a fee of 10 dollar fee each time you take a kickboxing class.

Write an equation for to show how your total price (y) is a function of how many classes you take (x).


total price = 10 x (num. of classes) + 20

y = 10x + 20
300
Your weight is a function of how many bags of cheetos you eat.

Which variable is the -input-?


How many bags of cheetos you eat.
400
What is the slope of this line?

slope = 2
400
The point you would plot first when graphing the equation,

y= -2x + 3

What is the y-intercept?

or

What is (0,3)?
400
Linear Function, Nonlinear Function, or NOT a function?

2x - 3y = 18


LINEAR FUNCTION
400
Describe a graph that realistically shows how speed is a function of time for a car driving home stuck in rush-hour traffic.




The slope will not be very slanted and sometimes 0
400
A candle is burning. The height of the candle
is a function of the time the candle spends burning.

Is the slope of this function positive, negative, zero, or undefined?


NEGATIVE
500
On a coordinate plane, you have a point at (1,1).
You go up 3, and over 0 to get to your next point at (1,4).

What is the slope of this line?


Undefined, there is no slope.

500
Look at this table:

x_|_y
0 | 8
1 | 6
2 | 4

Is the slope negative, positive, zero, or undefined? How do you know?


Negative. m = -2
500




Make a table that shows an example of something that is NOT A FUNCTION
500
There are two cell phone plans for texting. Each one's plan can be modeled with an equation where x represents the number of texts over your limit, and y is the total price.

Plan A: y = 0.25x + 17 Plan B: y = 0.15x + 25

Plan B is cheaper BY HOW MUCH if you go 100 texts over your limit?


$2.00
500
Describe a graph that shows how money is a function of time(hours)
for somebody babysitting, if they get paid a flat $50 for the
evening.


horizontalline

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