What is the equation of the line passing through #(3,3)# and #(-4,12)#?

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Answer 1 · 2016-03-29T18:10:18

#y=-9/7x+48/7#

#"use the fallowing equation"#
#(y_2-y_1)/(x_2-x_1)=(y-y_2)/(x-x_2)#

#x_1=3#
#x_2=-4#
#y_1=3#
#y_2=12#

#(12-3)/(-4-3)=(y-12)/(x+4)#

#9/-7=(y-12)/(x+4)#

#9(x+4)=-7(y-12)#

#9x+36=-7y+84#

#7y=-9x+84-36#

#7y=-9x+48#

#y=-9/7x+48/7#