Last week, we were taught how to graph an line using a table of values, how graph a line using intercepts and how to graph a line using the slope-intercept method.
Today, we learned how to find the equation of a line. There are questions that will help us in doing this.
- What are you asked to find?
- What do you know?
- What can you do with that info?
- Anything else?
Now, we will find the equation on this line:
In solving this, we'll use the questions above.
Now that we know that y=1/3x+1, we can plot other points. Always remember that the distance for every point in the line is the same.
If you want to find the equation of a line and you are NOT given the the y-intercept but you have the coordinates of a pt. and the slope, you can still find the equation.
another example:
1. points are (-1, 4) and m=-1/3
m=(x-x1)=y-y1
1/39-1=-x=4+-y
-1/3 - 1/3x=4-y
[4-1/3]-1/3x=y
11/3-1/3x=y
y=-1/3x+11/3
I hope you understand the lesson... I tried really hard on doing this..
If I have mistakes, please inform me and I will correct it...
The next blogger is JAEBY!!!!
