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write an equation of the line through the given points (-3,-2), (0, 10)

heakyung001

by heakyung001 at February 24, 2010

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If we are given two points of a linear equation, we are able to find the slope by plugging in the values of each point in the right place to find slope. Slope can be found with this equation:         y2 - y1m =   x2 - x1(Think of the points as (x1, y1) and (x2, y2). That should make it easier to see the problem)We substitute values for each y and x, and we find that m = 4.Now that we know the slope, we need to find what b equals in the equation. However, we just saved ourselves some work! The problem happened to give us the y-intercept with the point (0, 10) (y-intercepts always have an x-value of 0). So, b = 10.Now all we have to do is write our equation!y = 4x + 10~ Azaler

Azaler Azaler February 24, 2010

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