Is Assignment 6 due on Monday or Tuesday? I thought on the board it said Tuesday, but on this it says MOnday?

Thanks!

Ashley, I intended to have the assignment due on Monday, but if I accidentally wrote Tuesday on the board, I'll be flexible about when people turn it in.

hello.

I've tried to attempt the homework but I don't understand where to begin the problem. I understood everything you did on class on Friday, but I can't seem to apply it to the homework problems..

I am having the same problem as jen

I'd love to help, but can someone ask a more pointed question? If no one responds soon, I will post some hints.

I am having a lot of troubles as well, as I am reading the section I am able to understand the first page then I am getting confused on the difference quotient and how that jumps to finding the deriative. I know that is a big question and basically what this whole section is on but I don't even know where to start.

I'll make some general comments here and then start a new thread with some hints.

For all of the problems, you will make use of the formula for the *difference quotient*:

For any problem where you are asked to find the slope of the chord, you essentially just have to plug in the given information into the formula above. If you start with concrete values, your answer will be a number.

When the directions are "Determine what happens as $\Delta x$ approaches 0," the game is to simplify the formula for the difference quotient as much as possible and then just plug in 0 for $\Delta x$. This is equivalent to finding the derivative (in general terms or at a specific point). However, don't really worry about the word derivative yet. You have to simplify before plugging in 0 for $\Delta x$ because otherwise you will be dividing by 0, which we know we can't do. For the example, I did in class, we multiplied everything out, cancelled like terms, factored, and then divided. This last step killed the $\Delta x$ in the denominator. The actual work you do for a given problem depends on what function you are starting with. (Someone commented on this in class.) The general rule is to do whatever it takes to kill $\Delta x$ in the denominator.

The big picture here is that as $\Delta x$ approaches 0, we are converting chords into the tangent line at a given point.

In problem number two I am trying to set up the formula but can't figure out where to plug in the 20. If I plug it in for X then I don't understand how to use the formula written above, or what the next step is.