Question

iris has 120 songs on her playlist . Each week , she downloads 4 new songs. write an expression to show the total numbers of songs on iris's playlist after w weeks.

Answer 1

S = 4w + 120

Explanation:

Let's use "S" for the total number of songs.

Since the amount is increasing at a steady rate, it is a linear equation, so it has the form of:

y = mx + b

m is the slope (rate of change) and b is the y-intercept (the starting value).

The number of songs starts at 120 and increases by 4 each week, so the equation is:

S = 4x + 120