<PRE><B>Question 106514</B>
A system of linear equations has solutions (1, -1) and (-2,3).
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The only way two lines can intersect in two points is when
the two lines are really the same line.
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Your problem
slope = -4/3
Then -1 = (-4/3)*1 + b
b = -1 +(4/3) = 1/3
EQUATION:
y = (-4/3)x + (1/3)
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a)Can you find another solution?
There are an infinite number of solutions:
Let x=0 then y = (1/3) 
Let x = 3 then y = -11/3
etc.
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b)How many solutions must exist?
An infinite number
Cheers,
Stan H.</PRE>