Answer:
Step-by-step explanation:
The number of pages written after x days can be represented by the following equation:
y = 5x + 15
Here's why:
y: represents the total number of pages written (unknown quantity we want to find).
5: represents the number of pages Sarah writes each day (constant rate).
x: represents the number of days that have passed (unknown variable).
+ 15: represents the number of pages Sarah has already written (initial quantity).
This equation reflects that the total number of pages written (y) depends on two factors:
The number of days that have passed (x) multiplied by her daily writing rate (5 pages/day).
The number of pages she already had written (15 pages).
By adding these two quantities, we get the total number of pages written after x days.