plz explain slope to me?

Question

I need some algebra help. I can run circles around people in english, and history, but algebra is another story. I'm in an advanced class, and I have a test tomorrow. Plz explain how to figure out slope, and things involving it. I have a C in my class, and I want to raise my grade by getting a good grade on this test.

can someone give me a good example. and how do u decide what m and b are in y=mx+b?

Answer 1

slope = ΔY/ΔX

so if you have two points (x1, y1) (x2, y2)
slope = (y1 - y2)/(x1 - x2) = (y2 - y1)/(x2 - x1)

Answer 2

Slope is just rise over run. Like... it's a fraction, right? Even if it is just written as a whole number, it is actually on top of a 1. You start at one point on your graph, say (2,2). The slope is 7/1. RISE OVER RUN. Go up seven points, then from there, move one to the right. If it were negative, you would move over to the left.

Now, point-slope form is y=mx+b. y and x are your coordinates, m is the slope, and b is your y-intercept. The y-intercept is the point on the y axis where the line hits it, savy? If it's in Ax+By=C format, then you just work it out until there is just y equaling everything. Like this:
Ax+By=C
By=C-Ax
y=(C-Ax)/B or y=C/B-Ax/B

If your line is horizontal, then it is zero slope. If it's vertical it is undefined because...think of it like a roof top. Even if it is pointing straight up you'd say it was still steep (aka- it has a steep SLOPE), right? But if it it's going straight across it isn't steep at all! A negative slope is negative because the end that points upwards goes to the left, and as we all know, lefties are negative people. (j/k)But that's how I like to remember it. When it points right it's positive. It's the same way on a number line.

Any other questions, look at sparknotes.com/math

Hope this was helpful!

Answer 3

Slope = the rate of decline or incline of a line.

Slope of a line is defined as rise over run...in other words y over x

y
_
x

If you picture a graph with the x and y axis available, the slope of a line would be the difference between the two points.
Ex: (2,3) and (7,4) plotted on a graph

2 , 3 The slope of this line would be -5/-1 or 5
- 7 , 4
---------
-5 , -1

Hope this was clear enough for you...

Answer 4

Slope is how steep a line is. A line with a positive slope moves up as x increases and one with a negative slope moves down as x increases.

The formula for determining slope is:

Change in Y
----------------
Change in X

Answer 5

This site has a good, simple explanation with a helpful graphic to help you understand even better!

http://mathforum.org/cgraph/cslope/calculate.html

A.L.

Answer 6

rise over run --- how many points you go UP(or down) over the amount of points you go left or right :)

thats how i remember.. hope i helped