Since you have a board that is 8 and 1/4 feet long, the easy way to calculate how many 1/2 feet are on 8 feet is two multiply 8 x 2, since there are two halves of a foot, in one foot (because two halves equal one whole). Now this may sound confusing but we can double check. _________ | | As we can see here, there are two rows, each with 8 halves. V V So now we multiply 8 x 2 and get 16. 1/2 + 1/2 = 1 1/2 + 1/2 = 1 1/2 + 1/2 = 1 1/2 + 1/2 = 1 1/2 + 1/2 = 1 1/2 + 1/2 = 1 1/2 + 1/2 = 1 1/2 + 1/2 = 1 ^-- Now if you add all of these, it's 8, proving that you can do 8 x 2
Yes, you may be asking, "What about the 1/4?" Don't worry about it! Questions like this try to trick you into making it more complicated, it asks how many halves are in 8 and 1/4, but 1/4 isn't enough to make a half so we leave it alone.
Because you gave two points that I'm guessing are from the graph I think that's the answer. Because when you use the slope formula y2-y1 over x2 - x1 you get -5/-2 or you either get 2.5 meaning that is the slope specifically saying the rate of change. You get 2.5 when you divide -5/-2 incase you need a decimal or want to simplfy it.
