4th December 2019

varsitytutors
15

How do you find the equation of a graph?

Suppose you are given the graph of a line in the coordinate plane, and asked to find its equation. If you can find the -intercept and the slope , you can write the equation in slope-intercept form (unless, of course, it's a vertical line .) Example : Find the equation of the line shown.

Consequently, how do you write an equation from a graph?

To write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. This is the value of m in the equation. Next, find the coordinates of the y-intercept--this should be of the form (0, b). The y- coordinate is the value of b in the equation.
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