Linear function for algebra pleas help me

Question

which of these equations are linear functions that go through the point (0,6)? Explain your reasoning.

y= 6x

y=x^2=6

y =x+6

y=2x+6

I saw another answer this bit there was not an explanation pleas explain to me this question

Answer 1

the last two,

plug, replace x with 0, and y with 6 into each equation.

only y=x+6 becomes 6=0+6 = 6

y=2x+6 becomes 6 = 2(0)+6 = 0+6 = 6

while 6x = 6(0) = 0 not 6

and 2x^2 = 2(0)^2 = 2(0) = 0, not 6