a classroom is arranged with 10 seats in the front row 12 seats in the middle row and 18 seats in the back row the teacher rando
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In case you're not already aware, the expression is called the "difference quotient" and represents the average rate of change of a function
over an interval
.
For the function , by substituting
we get
Then the difference quotient is
where the last equality holds as long as .
