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%.

shift 4 units up, and 1 unit left.

it will translate f(x) = 3^x to g(x) = 3^(x+1) + 4