Applied Math 20S (Fall 2008): Slides October 16th

Applied Math 20S (Fall 2008): Slides October 16th

A Simple Worded Recap.

So, what we basically need to know at the moment:
- a (-)negative and a (-)negative is a (+)positive.
- To get the perpendicular slope, you flip
the fraction and change the sign.

Now, definitions.
Slope (m) - RISE over RUN - Line segment of an angle between a given straight line on an x-axis coordinate.
Reciprocal - AKA multiplicative inverse - A number related to another in a way that when multiplied together their product is 1. For example, the reciprocal of 7 is ¹/₇ ; the reciprocal of ²/₃ is ³/₂ .
Perpendicular (Upside down T) - Lines that meet at a 90° angle.
Parallel (||) - Two lines with the same slope that never meet.

As you should have already seen, the symbol
for perpendicular and parallel make perfect sense.
T(upside down) two lines that can meet,
|| and two lines with the same slope that never meet.

I've also learnt something today...
That the colour YELLOW is deathly blinding!


Also, for those who are curious of
how many E's Thuan's account name has;
there are exactly 169.