Question

Hey guys :3 , I got a problem solving problem number 1, c in the first worked example in Session 1: Introduction to Derivatives and the solution doen't tell how I can solve the problem .. help please :)

Answer 1

Are you asking about the problem that involves using the applet?
To answer part c. you use the top slider (orange) to select the x value e.g. -0.75
click the Tangent box, and you will see that dy/dx = -0.16
within .1 of that value would be -0.16-0.1= -0.26
and -0.16 + 0.10 = -0.06

use the bottom slider (yellow) so that \(\Delta y / \Delta x\) is -0.26 and note the value for \( \Delta x \)
now do the same thing for -0.06
any \( \Delta x \) between those values is an answer.

Answer 2

thank you :)