Answer :

Ryan2
Write the matrix form of the function and solve:

[tex] \left|\begin{array}{ccc}x&y&1\\1&2&1\\2&5&1\end{array}\right|=0\\ \\ 2x+2y+5-4-y-5x=0\\ \\ -3x+1+y=0\\ \\ \boxed{y=3x-1}[/tex]

#1 - 3, 1, 2

#2 - x+2y=4

#3 - y=3x-1

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