You start out with $20 and then spend money in a store where every item is $3. Y = -3x + 20. Use your graph for problem to predict the answer. What is the largest number of items you can buy?

Question

anonymous · Answer

Notice that

y = -3(7) + 20

or

Y = -21 + 20 = -1

Can we have negative money here?  No credit cards!!

If we cannot have negative money, 7 does not work, so the most we can buy is ?

anonymous · Answer

41?

anonymous · Answer

almost .... if you cannot afford 7 items, the store will not sale you 41 items.

If you cannot afford 7 items, then you can buy?  how many?

anonymous · Answer

2?

anonymous · Answer

6.  If you cannot afford 7, then you can buy one less, 6.

anonymous · Answer

lol oh well thank you for telling me

anonymous · Answer

your welcome