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Mathematics 19 Online
OpenStudy (anonymous):

how do i get a slope-intercept?

OpenStudy (anonymous):

From... co-ordinates? Slope:\[\Large \frac{{\Delta y}}{{\Delta x}} = \frac{{{y_2} - {y_1}}}{{{x_2} - {x_1}}}\] And the intercept is where x = 0.

OpenStudy (dumbcow):

slope-intercept form is: y = mx + b, where m is the slope shown above ^^

OpenStudy (anonymous):

(3,-12) and (-4,2) are the co-ordinates can any one show how to work this problem?

OpenStudy (dumbcow):

first find the slope using formula above

OpenStudy (anonymous):

slope=14/-7

OpenStudy (dumbcow):

good, reduce 14/-7 = -2 then pick a point and use the x and y values to solve for b (y-intercept) y = mx +b (m=slope =-2) y = -2x +b

OpenStudy (anonymous):

y=-2+(-6)

OpenStudy (dumbcow):

yes, so that is the line that goes through those 2 points

OpenStudy (anonymous):

thanks

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