### Home > CALC > Chapter 3 > Lesson 3.1.2 > Problem 3-34

3-34.

In many textbooks the derivative (or IROC) is described in terms of * *and

*(delta*

*) instead of*

*and*

.

Explain why

andare equivalent. can be translated as 'change in .'typically appears in the expression:. How are these equivalent? Use the picture above and the definition of IROC to write the slope of the tangent line in terms of

and. 'Definition of the Derivative' is the same thing as 'Instantaneous Rate of Change': IROC