The graph above shows the total cost of goldfish at the aquarium shop. use a table to find out how much 5 goldfish cost.

Seems to be 2 fish=4 dollars, 4 fish is 8 dollars

hmm, we notice that for x fish, it costs 2x dollars

so for 5 fish, it costs 2 times 5 or 10 dollars

costs 10 dollars
we can also just draw a line through the points and see it intersects fish=5 at dollars=10

10 dollars for 5 fish