Martha has 3 cards but she wants to make more. if she makes five cards an hour, how many cards will she have after 6 hours

Make an equation in the form of y=mx+b

b is the number of cards that she started with, because if x=0, the number of hours is zero, then she would have the number of cards she has now.

y=mx+3

M is the rate of change, how many cards she makes in one hour, which is 5.

y=5x+3

Now, find the number of cards after 6 hours

y=5 (6) + 3

y=30+3

33 cards