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8th Grade Functions
Test Description: Intro to Functions
Instructions: Answer all questions to get your test result.
1) What is true about the X value in functions?
A
It switches with the y value
B
It never repeats
C
It repeats
D
It doubles
2) What do you use on a graph to confirm if an equation is a function?
A
Vertical Line Test
B
Connected points
C
Horizontal Line Test
D
Single points
3) Which of the following is not a way to confirm if an equation is a function?
A
Set of Coordinates
B
Table of Values
C
Mapping
D
Looking at the equation
4) Which part of the equation can repeat in a function?
A
The y-intercept
B
The slope
C
The Y Values
D
The X Values
5) In the equation y=mx+b, identify the y-intercept variable.
A
b
B
x
C
y
D
m
6) In the equation y=-3x+6, identify the slope.
A
-3
B
6
C
y
D
x
7) The function f(x)=6x-4 is what type of function?
A
Cubic
B
Linear
C
Quadratic
D
Nonlinear
8) Which type of math can a linear function not have?
A
fraction
B
addition
C
multiplication
D
square root
9) f(x)=-3x-8 and g(x)=-3x-4...which description is true?
A
They both have the same slope but g(x) is above f(x)
B
They both have the same slope but f(x) is above g(x)
C
They have different slopes and different the same y-intercept
D
They intersect at right angles
10) Identify the slope and the y-intercept in f(x)=2x-8
A
Slope = -8, Y-Intercept = 2
B
Slope = 2, Y-intercept = 8
C
Slope = 8, Y-Intercept = 2
D
Slope = 2, Y-intercept = -8
11) Identify the slope and y-intercept of f(x)= (1/3)x-6
A
m = (1/3), b = -6
B
m = 6, b = (1/3)
C
m= (1/3), b = 6
D
m = -6, b = (1/3)
12) Which of the following is a linear equation?
A
y = -3x+4
B
y = x^4 - 8
C
y = x(x) + 6
D
y = x^2 + 4
*select an answer for all questions
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