Question

Marla has a pet hamster. The hamster makes 3 laps around her cage every minute.

Answer 1

Let

x-------> the time in minutes

y------> the number of laps

we know that

In this problem the linear equation represent a direct variation and the slope is equal to

$m=3\frac{laps}{minute}$

so

the equation of the line is

$y=3x$

For $x=1\ minute$

the value of y is equal to

$y=3*1=3\ laps$

Plot the point $(1,3)$ in the graph

therefore

the answer is

The solution is the line b

see the attached figure to better understand the problem

Answer 2

Find the line that goes up three for every one to the right it goes. B is the line that fits the equation.