Need help with finding line equation for set of points

[lindsay121093]

How would I make an equation out of these points?

(-1, -7), (0, -3), (1, 1), (2, 5), (4, 13), (15, 17)

 

[jonboy]

Find you slope (\(\displaystyle m\)):\(\displaystyle \L \;\;m\,=\,\frac{y_1\,-\,y_2}{x_1\,-\,x_2}\)

Next plug \(\displaystyle m\) in your equation:\(\displaystyle \L \;y\,=\,mx\,+\,b\)

Finally plug in one of those coordinate to solve for \(\displaystyle b\).

 

[lindsay121093]

kk
could u give me an example with one of my numbers???
i still dont rely get it

 

[stapel]

could u give me an example with one of my numbers?

The slope formula is fairly simple. You just pick any two of the points, plug the x- and y-values into the formula, and simplify. Where are you stuck?

Please be specific. Thank you.

Eliz.

 

[jonboy]

Use these 2 coordinates:\(\displaystyle \L \;(-1,-7),(0,-3)\)

Give her a go and we'll see how you do.

 

[lindsay121093]

im confused about the whole thing

i dont get how to make an equation using coordinate number, and i dont get how to put these numbers in a graph, and i dont get how to take numbers out of a graph and put in into an equation

 

[lindsay121093]

i have no idea where to even start

Use these 2 coordinates:\(\displaystyle \L \;(-1,-7),(0,-3)\)

Give her a go and we'll see how you do.

 

[stapel]

im confused about the whole thing

Has none of this been covered in class...?

(Please note that we cannot teach all the background information -- variables, evaluation, integers, graphing, etc, etc -- so if you really don't know any of that stuff, you'll probably need to drop back to the previous course, or else hire a tutor and work face-to-face every day for a few weeks to get caught up.)

Thank you.

Eliz.

 

[lindsay121093]

I'm not very good at math

sry