# The entrance fee to the national park is $15. A campsite fee is$15 per night. The total cost y for a camping trip for x nights can be represented by the equation y=15x+15. How do you graph the equation?

Jan 19, 2017

Have a look:

#### Explanation:

Your equation represents a straight line passing through $y = 15$ and with slope $15$ (the coefficicient of $x$). The slope tells you that for each increment of $1$ in $x$ then $y$ increases of $15$.

To graph it you can set:

$x = 0$ giving the intercept $y = 15$
and, say...
$x = 1$ giving $y = 15 + 15 = 30$
whith these two points you have enough informations to plot your line: