Learn about the slope-intercept form of linear equations and how to use it in algebra.

Learn about the slope-intercept form of linear equations with Khan Academy's video tutorial.

First of all (I'm sure you already did this :) ), given the points (1,4 --> where 1 is X1 and 4 is Y1) and (2,2 --> where 2 is X2 and 2 is Y2), we need to find the slope using the slope formula (Y2-Y1) / (X2/X1).

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The computed value for b is the desired y-intercept. You can then try this with the other ordered pair. If you did this correctly, you should get the same vaue for b.

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In working with my Algebra 1 students in Khan Academy, y-intercepts are entered as points, yet most textbooks I have examined indicate that the y-intercept of a function is the y-value of the point where the graph intersects the y-axis.

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