AnswersAlgebra ILinear Functions

Practice Test Answers

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1
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A line is drawn through negative 4 comma 3 and 4 comma 3 Which describes whether or not the line represents a direct variation?

A
The line represents a direct variation because it is horizontal.
B
The line does not represent a direct variation because it does not go through the origin.
C
The line represents a direct variation because negative 4 thirds is equal to 4 thirds .
D
The line does not represent a direct variation because negative 4 times 3 is not equal to 4 times 3 .
2
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Mr. Shaw graphs the function f of x is equal to negative 5 x plus 2 for his class. The line contains the point negative 2 comma 12 What is the point-slope form of the equation of the line he graphed?

A
y plus 12 is equal to negative 5 times open paren x minus 2 close paren
B
y minus 12 is equal to negative 5 times open paren x plus 2 close paren
C
y minus 12 is equal to 2 times open paren x plus 2 close paren
D
y plus 12 is equal to 2 times open paren x minus 2 close paren
3

Which linear function represents the line given by the point-slope equation y minus 8 is equal to 1 half times open paren x minus 4 close paren ?

A
f of x is equal to 1 half x minus 10
B
f of x is equal to 1 half x minus 12
C
f of x is equal to 1 half x plus 4
D
f of x is equal to 1 half x plus 6
5

Timmy writes the equation f of x is equal to 1 fourth x minus 1 He then doubles both of the terms on the right side to create the equation g of x is equal to 1 half x minus 2 . How does the graph of g of x compare to the graph of f of x ?

A
The line of g of x is steeper and has a higher y -intercept.
B
The line of g of x is steeper and has a lower y -intercept.
C
The line of g of x is less steep and has a lower y -intercept.
D
The line of g of x is less steep and has a higher y -intercept.
7

A line that passes through the points negative 4 comma 10 and negative 1 comma 5 can be represented by the equation y is equal to negative 5 thirds open paren x minus 2 close paren Which equations also represent this line? Choose three correct answers.

A
y is equal to minus 5 thirds x minus 2
B
3y is equal to minus 5x plus 10
C
5x plus 3y is equal to 10
D
y is equal to negative 5 thirds x plus 10 thirds
E
3x plus 15y is equal to 30
8

Line cap q cap r goes through points Q 0 comma 1 and R 2 comma 7 Which equation represents line cap q cap r ?

A
y minus 1 is equal to 3 x
B
y minus 7 is equal to x minus 2
C
y minus 1 is equal to 6 x
D
y minus 7 is equal to 2 x minus 6

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Practice Test Answers — Algebra I