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Practice 20 QuestionsShow answers
• Question 1
30 seconds
Q. - # of hours worked
Which is the dependent variable?
hours worked
paycheck amount
• Question 2
30 seconds
Q. - speed of car
- speeding ticket amount
Which is the independent variable?
speed of car
speeding ticket amount
• Question 3
30 seconds
Q. - the amount of money you save
- the number of days you can visit Hawaii
Which is the dependent variable?
amount saved
days in Hawaii
• Question 4
30 seconds
Q. f(x)=x2-2x+1
Evaluate the function for f(-1).
f(-1)=4
f(-1)=0
f(-1)=2
f(-1)=-1
• Question 5
30 seconds
Q. f(x)=2x+1
If f(x)=4, what is the value of x?
3/2
2
1/2
4
• Question 6
30 seconds
Q. When is a function increasing?
When the y-values and x-values are decreasing together.
When the y-values are decreasing and the x-values increasing.
When its going up.
When the y-values and x-values are increasing together.
• Question 7
30 seconds
Q. Which ordered pair could represent a y-intercept on a graph?
(6, 0)
(0, 4)
(-1, 3)
(2, 0)
• Question 8
30 seconds
the function f
function notation
f of x
replaces y
• Question 9
30 seconds
Q. What is the vocabulary term that describes this: f(x) ?
f of x
functions
function rule
function notation
• Question 10
60 seconds
Q. The set of x-coordinates of the ordered pairs of a relation is called?
range
relation
domain
correlation
• Question 11
60 seconds Q. Choose the relationship that fits the table, graph, and mapping diagram.
{(-1,0), (0,1), (2,1), (3,4)}
{(-2,-1), (-1,1), (2,3), (3,4)}
{(-4,5), (-2,3), (0,1), (2,-1)}
{(-2,-1), (-1,0), (0,-1), (2,-1)}
• Question 12
60 seconds
Q. Identify the Independent and Dependent Variables, then write a rule in function notation.
A baker spends \$6 on ingredients for each cake he bakes.
Ind: Cost
Dep: Cakes
f(c) = 6c
Ind: Cakes
Dep: Cost
f(c) = c + 6
Ind: Cost
Dep: Cakes
f(c) = c + 6
Ind: Cakes
Dep: Cost
f(c) = 6c
• Question 13
60 seconds
Q. What is the definition of function?
Has inputs and outputs
Every input has only ONE output
Inputs have different outputs every time
x-values and y-values
• Question 14
180 seconds
Q. Evaluate f(-4) for the function f(x)=3x2-5
f(-4) = 43
f(-4) = 139
f(-4) = -52
f(-4) = -149
• Question 15
30 seconds
Q. A relation is a set of:
pictures.
random numbers.
geometric figures.
ordered pairs.
• Question 16
60 seconds
Q. A function is a special relation that has:
Domain matches Range
one output for each input.
a single range value for each domain value.
All of the above.
• Question 17
30 seconds
Q. Which variable is the DEpendent variable?
x
y
• Question 18
60 seconds
Q. Give the domain and range of the relation.
{(-2,-1), (-1,0), (0,-1), (1,0), (2,-1)}
D: {-2, -1, 0, 1, 2}
R: {-1, 0, -1, 0, -1}
D: {-1, 0}
R: {-2, -1, 0, 1, 2}
D: {-2, -1, 0, 1, }
R: {-1, -1, -1, 0, 0}
D: {-2 < x < 2}
R: {-1 < y < 0}
• Question 19
60 seconds
Q. A local parking garage charges \$5.00 for the first hour plus \$1.50 for each additional hour or part of an hour. Write a relation where x represents the hours, and y represents the cost. Is it a function?
y = 1.50x + 5
Function
y = 5x + 1.50
Function
y = 1.50x + 5
Not a Function
y = 5x + 1.50
Not a Function
• Question 20
300 seconds
Q. Kim burns 85 calories per hour hiking. How many calories will Kim burn in h hours? Identify the independent variable of this situation.