Respuesta :

Find Slope:
y = -x + 3
slope = -1
Perpendicular slope = 1

Sub Slope into Equation 
y = mx + c
Found that m = 1 (slope = 1)
y = x + c

Find C
At (-1,3)
3 = (-1) + c
c = 3 + 1
c = 4

Sub C into the equation 
y = x + 4

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