# Chapter 1, Equations and Graphs - Section 1.10 - Modeling Variation - 1.10 Exercises: 6

(a) not proportional (b) inversely proportional

#### Work Step by Step

(a) $y$ is not proportional to $x$ in the equation $y= \frac{3}{x+1}$ because it does not have the form $y=kx$ or $y=k/x$. (b) $y$ is inversely proportional to $x$ in the equation $y= \frac{3}{x}$, since it has the form of $y=k/x$.

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