(8,-1), (0,-7) find the slope of the line through each pair of points

To solve this problem you must apply the proccedure shown below:
 1. You must apply the formula for calculate the slope of a line, which is:
 
 2. Where:
 y2=-1
 y1=-7
 x2=8
 x1=0
 3. Substitute the values into the formula shown above. Therefore, you obtain:
 m=3/4
 Therefore, the answer is: The slope is 3/4.

The answer is 25/400 because it is 25 green marble and it 400 in all