The line plots shows the weights of 9 grapefruits. what is the difference in the total weight of all the 1 1/2 lb grapefruits and the total weight of all the 1 1/4 lb grapefruits? a) lb b) 2 lb c) lb d) 7 lb answer asap i am giving 30 points and brainliest get it right you get it all this is very !

B) 2lb

Step-by-step explanation:

First, you must convert from mixed numbers to fractions, as following

Point diagrams divide a sample into different classes, and allow to observe the frequencies of each class.

In this case, the different weights of the grapefruit constitute the classes. From a sample of 9 grapefruit, some will weigh  others weigh , etc.

We need to observe the dot diagram to know how many   grapefruit we have and how many  grapefruit we have. In other words, we need to know, in the diagram, how many points there are about class and how many points there are about class

Then, the total difference between all grapefruit of pounds and all grapefruit of  pounds is calculated as follows:

n () - m () = W

Where

W: Weight difference

n: Quantity of  grapefruit

m: Quantity of grapefruit of

Suppose that of the 9 total grapefruits, 3 of them weigh pounds and 2 of them weigh pounds. This is: n = 3 and m = 2

The difference in weight would be 2 pounds.