Suppose a system of two linear equations has one solution. What must be true about the graphs of the two equations?
2 answers:
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The correct option is D. I mean the last option
The equation of the vertical line is
x=-3
So its inequality is
x<-3
The solid line passes through
(0,-1), (-1,0)
So its inequality is
y≤-x-1
Testing (-4,0) for
We shade to the left.
Testing the origin for
yields
This is false so we shade the left half plane of the solid line. The intersection of the two region is the region in option D
The equation of the vertical line is
x=-3
So its inequality is
x<-3
The solid line passes through
(0,-1), (-1,0)
So its inequality is
y≤-x-1
Testing (-4,0) for
We shade to the left.
Testing the origin for
yields
This is false so we shade the left half plane of the solid line. The intersection of the two region is the region in option D