Algebraic Relationships 11
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8th Grade AR11. Recognize direct variation using tables, graphs, and equations. The variables x and y vary directly. Write an equation that relates x and y if y = 15 when x = 3. A. B. C. D.
y = 15 x + 3 y = 3x y = 5x y = 3 x + 15
Which table shows direct variation? A.
x 1 2 3
2 3 4
C.
x
y
1 2 3
y
3 5 7
B.
x
y
1 2 3
2 4 6
D.
x
y
1 2 3
1 1 1
Which of the following graphs shows direct variation between x and y?
A.
B.
C.
D.
526669.doc
1
y = 15 x + 3 y = 3x y = 5x y = 3 x + 15
Which table shows direct variation? A.
x 1 2 3
2 3 4
C.
x
y
1 2 3
y
3 5 7
B.
x
y
1 2 3
2 4 6
D.
x
y
1 2 3
1 1 1
Which of the following graphs shows direct variation between x and y?
A.
B.
C.
D.
526669.doc
1
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