21) Mugs Café sells 1000 cups of coffee per week
if it does not advertise. For every $50 spent in
advertising per week, it sells an additional 150
cups of coffee.
a) Find a linear function that gives
y = number of cups of coffee sold per week
X= amount spent on advertising per week.
b) How many cups of coffee does Mugs Café
expect to sell if $100 per week is
spent on
advertising?