Question

according to the graph, how many songs can be purchased with a $15 gift card?
done
the domain of the function is all
the range of the function is all
whole numbers.
real numbers greater than or equal to zero.
integers.

Explanation:

Step1: Locate $15 on x-axis

Find $x=15$ on the horizontal axis, then move vertically to the corresponding data point. The point has a $y$-value of 9.

Step2: Identify domain type

The $x$-values represent dollar amounts for song purchases, which are non-negative whole numbers (you can't spend a fraction of a cent on a song in this context, and can't spend negative money).

Step3: Identify range type

The $y$-values represent the number of songs, which are non-negative whole numbers (you can't buy a fraction of a song, and can't buy a negative number of songs).

Answer:

1. Number of songs with $15: 9
2. Domain: whole numbers
3. Range: whole numbers