The form of the linear equation is
[tex]y=mx+b[/tex]
y must have power 1 and also x mast have power 1
Let us check each answer
[tex]A)3x+2y=8[/tex]
Since x and y have the power of 1, then
The graph of it is a line
[tex]B)y=\frac{x}{2}-5[/tex]
Since x and y have the power of 1, then
The graph of it is a line
[tex]C)x=4y[/tex]
Since x and y have the power of 1, then
The graph of it is a line
[tex]D)y=x^2+3[/tex]
Since x has a power of 2, then
The graph of it is not a line
The answer is D
