Question

While surfing the Internet, you find a site that claims to offer "the most popular and the cheapest DVDs anywhere." Unfortunately, the website isn't clear about the how much they charge for each DVD, but it does give you the following information

Number of DVDs Ordered 1 2 3
Total cost (include S&H) $15 $24 $33
Plot the points and connect them to form a line.

Answer 1

The linear equation graph shows that the equation is: y = 9x + 6

How to plot the linear equation?

The general form of a linear equation is:

y = mx + c

where:

m is slope

c is y-intercept

Now, the number of DVDs which is the input function will be on the x-axis

Total cost will be on the y-axis which is the output function.

Using the given coordinate system, we have the graph as attached.