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

It is a percent increase because going from 70 to 85 is going from a smaller to a bigger number.

The percent increase is 21% approximately.

Step-by-step explanation:

The percent increase or decrease can be found by computing:

We have new=85 and original=70.

Plug in the given values into the formula:

Divide top and bottom by 5:

Putting 3 divided by 14 in my calculator gives:

0.2143 approximately

To convert to a percentage you multiply it by 100 which drags the deicmal over right 2 places:

21.43% approximately

Now let's see what happens if we do a 21.43% on 70. We should obtain something close to 85.

21.43% of 70=.2143*70=15.001

So 70+15.0001=85.001 which is approximately 85.

The approximate percent increase would be 21%

The answer and the work are attached in the image provided.

answer: haha (: i’ll go see what it is

step-by-step explanation:

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0