A cereal company determines that number of people who will purchase one of its products in first month that it is introduced is linearly associated to amount of money it spends on advertising. If spends $20000 on advertising, then 100000 boxes of cereal will be sold, and if spends $50000 on advertising, 200000 boxes of cereal will be sold
a) Write the equation which associates amount A spent on advertising to number x of boxes company aims to sell.
b) How much advertising is required to sell 600000 boxes of cereal?
c) Interpret slope