Find x if the slope between (2,-1) and (x,3) is -1.

Can anyone please help me with this? Thanks!
in Algebra 1 Answers by Level 1 User (800 points)

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2 Answers

slope=-1 av line tween 2 points: (x,3) & (2,-1)... deltax=2-x, deltay=-1 -(3)=-4... slope=deltay/deltax=-1=-4/(2-x)... -1*(2-x)=-4... 2-x=(-4/-1)=4... x=2-4=-2...point 1=(-2,3), so deltax=4 & deltay=-4
by
slope=4/x-2

-1=4/x-2

-x+2=4

x=-2
by Level 4 User (6.4k points)

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