I disagree with the student because the slope is the rate of change. The slope would be 10 because the rocks are increasing by 10 every month.
It is a nice linear equation. Remember y=mx+b
b is the y intercept you'll see
m is the slope rise over run
I don't like giving answers away but I am ready to help!
The answer to the question
805 thousandths in a decimal form is 0.805.