Answer:
Therefore the chance that a particular square inch is not by any drops during a given 10 second period is 
.
Step-by-step explanation:
Poisson distribution:
Given that rain is falling at an average rate 30 drops per square inches per minutes.
A reasonable choose of this distribution is Poisson distribution 
.
Let the area be a square inch.
Here 
= average rate of rain drop × area
=(30×a)= 30 a
t = 10 second 
.
Therefore,
Therefore the chance that a particular square inch is not by any drops during a given 10 second period is .
$530.40/4= $132.60
$132.60 x 3=$397.80
Or
$530.40 x .75= $397.80
To find the slope you use the slope formula y2-y1 / x2-x1. So use two point on the line we will make ours (1,2) and (3,4). Substitute to make 4-2 / 3-1 = 1/1 so using the rise over run method. The line rises up one and runs by one. The slash mark means divide, it's easiest in a fraction.
Also if you come across the equation y=mx+b, m is the slope and b is the y-intercept, this is called slope intercept formula.
If you already have an equation, all you have to do is locate the slope and look after it. But if it's in a graph, it's where the line is crossing the y-axis.
An example of the equation would be
y=2x+3
y=mx+b
2 would be m which is slope
and 3 would be b which is the y-intercept
