Question 1153183
.
<pre>

The formula for the cost is

    cost (x) = 3.00 + 0.6*x  dollars,

where x are kilometers.


Draw the graph on your own.


Calculate the cost of traveling 30 km on your own.


The distance you can travel for $13.80 is


    x = {{{(13.80-3)/0.6}}} kilometers = 18 kilometers.
</pre>

Solved.