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Functions
Functions
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Pre-Algebra basics working with function rules, rate of change, and initial values
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
Why is a linear function that is modeled by the equation
y=mx+b
useful
?
You can easily graph the line of the function
You can easily find the rate of change (slope)
You can easily find the initial value (y-intercept)
All 3 are reasons why it is useful
2
What is the initial value of the line whose equation is: y = 3x - 2
3
2
-2
0
3
Which of the following best represents rate of change?
function rule
slope
y-intercept
initial value
4
Describe the slope of the line
Positive
Undefined (Does Not Exist)
Negative
No Slope (m = 0)
5
Which of the following best represents rate of change in the equation y = mx + b
m
x
y
b
6
Who is this?
Thomas Jefferson
John F. Kennedy
George Washington
Abraham Lincoln
7
Describe the slope of the line
Postive
Negative
No Slope (m = 0)
Undefined (Does Not Exist)
8
Describe the slope of this line
Positive
Undefined (Does Not Exist)
Negative
No Slope (m = 0)
9
What is the rate of change of the line whose equation is: 3y = 2x - 4
-4
2/3
-4/3
2
10
Who is this?
Remy
Stuart Little
Ratatouille
Mickey Mouse
11
Who is this?
Dasher
Vixen
Prancer
Rudolph
12
Jo's PS4 game club charges $10 per month & $2 per game. Which function rule represents a month?
y = 10x + 2
y = 2x + 10
y = 10x - 2
y = 2x - 10
13
What is the function rule represented by the line on this graph?
y = -4x - 2
y = -2x -2
y = 2x -1
y = -x - 2
14
My mom charges me $50 plus $1.50 per mile to borrow her car. Which represents how mean she is?
y = 50x + 1.5
y = 1.5x + 50
y = 150x + 50
y = 50x + 150
15
What is the function rule represented by the line in the graph?
y = x - 3
y = -x + 3
y = 3x - 3
y = -3x + 3
16
Describe the slope of this line
No Slope (m = 0)
Positive
Undefined (Does Not Exist)
Negative
17
What is the rate of change of the line whose equation is: y = (-2/3)x - 4
-4/1
-2/3
(-2/3)x
-4
18
Heriberto and Isaac are saving money to buy a car. They have $10 but plan on saving $20 a week.
y = 20x - 10
y = 20x + 10
y = 10x + 20
y = 10x - 20
19
What is the initial value of the line whose equation is: -y = 6x - 15
-6
6
-15
15
20
Which of the following best represents initial value?
slope
rate of change
y-intercept
function rule
21
What is the initial value of the line whose equation is: 2y = 3x + 8
4
8
2
3
22
What is a function? What are they used for?
All of the above
Every input has exactly one ouput
Used to predict a totals (output) given any input value
A relationship between 2 variables
23
Which of the following best represents a function rule?
y + (1/2)x = 0
y + 4 = 3x
x = 2y - 9
7x -1 = y
24
Which of the following best represents initial value in the equation y = mx + b
x
m
b
y
25
What is the initial value of the equation whose line is: y + 3 = (1/2)x
0
-3
3
1/2
26
How can a linear function be represented?
On a graph (a line)
Verbally description
Algebraically (an equation)
Numerically in table (x- and y- chart)
