Slope of a Line

[defenestrate_moi]

Hi! I don't know how to solve these two problems. It wasn't taught to me.

1. (6√2, 5√3), (√18, √15)
2. (x, x²), (-y, y²)

There wasn't any examples inside my book.

 

[topsquark]

Please show any work you've done on this That will help us help you better.

To start you off: Say we have two points on a line [math](x_1, y_1) , ~ (x_2, ~ y_2) [/math] the slope of this line will be
[math]m = \dfrac{ y_2 - y_1 }{ x_2 - x_1}[/math](It doesn't matter which point we pick as 1 or 2. It works out the same.)

Can you finish 1 from here? (ie. you need to find the y-intercept as well.) Please post to us what you've been able to do with it. whether or not you got it right or wrong.

-Dan