### Home > MC1 > Chapter 9 > Lesson 9.2.3 > Problem9-78

9-78.

On your own graph paper, draw axes, decide on a scale, and plot points to represent the data in the table below. Does this data appear to be proportional? Explain why or why not.

Quantity x

Quantity y

$2$

$7$

$6$

$21$

$9$

$31.5$

$5$

$17.5$

$1$

$3.5$

Remember that proportional means that there is a multiplier you can use to find one quantity when you are given the other.
What do you multiply by $x$ to get $y$? Finding the multiplier should be easier with the smaller numbers.
$1\left(?\right) = 3.5$
$2\left(?\right) = 7$
In both cases you multiply by $3.5$, this is true for every $x$ and $y$ pair.

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