159k views
5 votes
How to write an equation from a graph

1 Answer

2 votes
It depends what type of equation you are trying to solve for.
For slope intercept form (y=mx+b)
- pick two coordinates and find the slope using the slope formula; y2-y1 over x2-x1.
- the y-intercept is usually found in (0, b) form.
After you have found the slope and the y - intercept you can finally plug in your numbers to match the formula.
Here is an example:
- My two coordinates on the line are (0,8) and (-1,5)
- 8-5 over 0--1 = 3 over 1, or 3 is my slope.
- To find the y intercept look for the pair that is found in (0,b) form which in this case is (0,8) so my y intercept is 8.
You found your slope and y intercept so your equation is.... y = 3x + 8
Hopefully this helped! This is how you find an equation for slope intercept form! If it is any other formula it is basically the same general steps.
User Jaakko
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories