Sarah makes decorative wreaths and sells them on eBay. She recently discovered that if she spends no money on advertising her wreaths, she can sell 100 wreaths in a year. However, if she spends $200 on advertising, her sales go up to 150 wreaths in a year. There is a linear relationship between the money spent on advertising and the number of wreaths sold. If x represents the amount spent on advertising and y represents the number of wreaths that Sarah sells, write an equation for y in terms of x .

Question