SOLUTION
Now, from the question, let the number of songs needed to be downloaded be x,
So, for the first which is $1.00 for the app and $3.00 for each song downloaded, the equation is
[tex]1+3x[/tex]For the second which is $5.00 for the app and $0.50 for each song downloaded, the equation is
[tex]5+0.5x[/tex]Now, let us graph both equations, we have
From the graph, the red line represents
[tex]1+3x[/tex]And the blue represents
[tex]5+0.5x[/tex]From the graph, we can see that the first option ($1.00 for the app and $3.00 for each song) is cheaper if we are to download just one song only.
But in reality, we cannot go for an online music app to download only one song. Since we will be downloading two songs and above, the second one ($5.00 for the app and $0.50 for each song) is cheaper.
Hence the answer is $5.00 for the app and $0.50 for each song is cheaper.
