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Find the value of x or y so that the line through the points has the given slope. (17,9) and (2,y); slope: -1/3

Respuesta :

y2-y1/x2-x1=slope
y-9/2-17=-1/3
y-7/-15=-1/3
y-7=-1/3 *(-15)
y-7=5
y=5+7
y=12
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