Question

the following dot plot shows the mass of each rock in nijas rock collection. each dot represents a different rock. how many rocks are in nijas collection? rocks

Explanation:

Step1: Count the dots

Count the number of blue dots on the dot - plot.
There is 1 dot at 35, 1 dot at 37, 3 dots at 39, 2 dots at 40, 1 dot at 41, 1 dot at 43, 1 dot at 44.

Step2: Sum the counts

$1 + 1+3 + 2+1 + 1+1=10$

Answer:

10