Answer:

Step-by-step explanation:
Assuming we want to find the equation (74,2) and (4,9)
This is an equation of a straight.
Let this equation be y=mx+b.

We substitute the slope and (4,9) to get:

We rewrite in standard form to get:

To compare the two classes, the Coefficient of Variation (COV) can be used.
The formula for COV is this:
C = s / x
where s is the standard deviation and x is the mean
For the first class:
C1 = 10.2 / 75.5
C1 = 0.1351 (13.51%)
For the second class:
C2 = 22.5 / 75.5
C2 = 0.2980 (29.80%)
The COV is a test of homogeneity. Looking at the values, the first class has more students having a grade closer to the average than the second class.
Answer:
The correct answer would be E I believe
Step-by-step explanation:
Answer = the value in the second picture or middle
The one in the second picture
The bar on top of the numbers 12 means that the 12 keeps on re-occurring
Step-by-step explanation:
Step 1: Write down the percent divided by 100 like this: percent 100.
Step 2: If the percent is not a whole number, then multiply both top and bottom by 10 for every number after the decimal point. ...
Step 3: Simplify (or reduce) the fraction<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>