As the x-variable increases, does y increase? Does y decrease? What does plotting the points on a coordinate plane suggest?
Inverse variation
Practice makes perfect
We want to determine whether the relationship between the variables in the given table is a direct variation, an inverse variation, or neither.
x
y
15
2.4
18
2
20
1.8
45
0.8
We see that as x increases, y decreases. This might be an inverse variation relationship. Let's see what happens if we plot the points on a coordinate plane.
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