If the average grade of an english class rose from 70 to 85, what is the approximate percent increase?
the percent increase is approximately 14%.
the percent increase is approximately 17%.
the percent increase is approximately 21%.
the percent increase is approximately 35%.

The percent increase is approximately 21%

Solution:

Given that average grade of an English class rose from 70 to 85

To find:  percent increase

The percent increase between two values is the difference between a final value and an initial value, expressed as a percentage of the initial value.

The percent increase is given as:

Here initial value = 70 and final value = 85

Substituting the values in above formula, we get

Thus percent increase is approximately 21%.

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

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