Jlara.......look at the bar that has the 20 on the bottom left and the 25 on the bottom right.....how high is that bar??? 4!!! This means that 4 cars get between 20-25 miles per gallon ....and this '4" is the "frequency" for the cars in this 20-25 range
Look at the next bar that represents 25-30 miles per gallon...how high is it?? 2!! This means there are 2 cars that get between 25-30 miles per gallon. And this '2" is the frequency for the 25-30 range
So far, 4 + 2 = 6
Now, just look at the remaining bars to the right (there are three of them) and their heights....add these heights to our total of 6 and that will be the answer....
