Question

Jen determined the masses of 7 rocks. She recorded he mass of 6f each rock on the line plot below. On the chart there is 1/4= 2 x's
2/4= 3x's
3/4 2'xs
1=0 x's
What is the total mass, in kilograms, of the 7 rocks?

Answer 1

Answer:

The total mass of the 7 rocks is $3\frac{1}{2}$ kilograms.

Step-by-step explanation:

Total mass of first 2 rocks $=2(\frac{1}{4})= \frac{1}{2} kg$

Total mass of next 3 rocks $=3(\frac{2}{4})= \frac{6}{4}=\frac{3}{2}kg$

Total mass of next 2 rocks $=2(\frac{3}{4})=\frac{6}{4}=\frac{3}{2}kg$

So, the total mass of all 7 rocks $= \frac{1}{2}+\frac{3}{2}+\frac{3}{2}=\frac{1+3+3}{2}=\frac{7}{2}=3\frac{1}{2}$ kilograms.

Answer 2

To find the total mass you will add the following masses together:

1/4 + 1/4 + 2/4 + 2/4 + 2/4 + 3/4 + 3/4

For every X you list the number that many times.

The sum is 14/4 or 3 2/4 or
3 1/2.

The answer is choice D.