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Mathematics 7 Online
OpenStudy (anonymous):

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OpenStudy (anonymous):

equation of line passing through (x1,y1),(x2,y2) is \[(y-y1)/(y2-y1) =(x-x1)/(x2-x1)\]

OpenStudy (anonymous):

yep.. jus simplify it..

OpenStudy (campbell_st):

ok... do it in bits 1st can you find the slope...?

OpenStudy (campbell_st):

ok... slope of the line is rise over run or using a formula \[m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}\] where \[x_{1} = -3, ...y_{1} = 5,....x_{2} = -9 ... and... y_{2} = 11\] you will need to substitute into the appropriate places and do the calculator to get te slope.

OpenStudy (campbell_st):

isn't (11 -5)/(-9 - -3) = 6/-6

OpenStudy (campbell_st):

so the slope is -1 the line can be written in slope intercept form as y = -1x + b then pick a point (-3, 5) substitute x = -3 and y = 5 into the equation to find b...

OpenStudy (campbell_st):

so you need to solve \[5 = -1 \times -3 + b\]

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