AnswersAlgebra ILinear Functions

Linear Functions — Test Answers

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21
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Which graph represents a function with direct variation?

A
Image with description A coordinate plane displays the x-axis labeled from negative 5 to 5 in increments of 1 and the y-axis labeled from negative 5 to 5 in increments of 1. A straight line with a negative slope passes through approximately the points negative 4 comma 2, 0 comma 0, 2 comma negative 1, and 4 comma negative 2.
B
Image with description A coordinate plane displays the x-axis labeled from negative 5 to 5 in increments of 1 and the y-axis labeled from negative 5 to 5 in increments of 1. A straight line with a positive slope passes through approximately the points negative 5 comma negative 3.5, 0 comma negative 2, 3 comma negative 1, and 5 comma negative 0.3.
C
Image with description A coordinate plane displays the x-axis labeled from negative 5 to 5 in increments of 1 and the y-axis labeled from negative 5 to 5 in increments of 1. A straight line with a positive slope passes through approximately the points negative 3 comma negative 4, 0 comma 1, 1 comma 2.5, and 3 comma 5.
D
Image with description A coordinate plane displays the x-axis labeled from negative 5 to 5 in increments of 1 and the y-axis labeled from negative 5 to 5 in increments of 1. A straight line with a negative slope passes through approximately the points negative 4 comma 5, 0 comma 1, 1 comma 0, and 5 comma negative 4.
23

Which equation represents a line that passes through 5 comma 1 and has a slope of 1 half ?

A
y minus 1 half is equal to 5 times open paren x minus 1 close paren
B
y minus 1 is equal to 5 times open paren x minus 1 half close paren
C
y minus 1 is equal to 1 half times open paren x minus 5 close paren
D
y minus 5 is equal to 1 half times open paren x minus 1 close paren
25

What is the constant of variation for the subscription cost based on the number of weeks?

A
1 point 5 0 dollars
B
7 point 5 0 dollars
C
15 point 0 0 dollars
D
30 point 0 0 dollars

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