Answer: e = 200 w + 0.04 s
Explanation:
Since, the earning in one week = 200 + 4% commission on her sales
Let the sales in w weeks is s,
Then the total amount e he get in w weeks,
e = 200 w + 4 % of s ( 1 % = 0.01 ⇒ 4 % = 0.04 )
⇒ e = 200 w + 0.04 s
Which is the required relationship between her sales in a given week and her weekly earning.