2) slope is 0,(1,2) is on the line

Step 1 ：The general equation of a line is \(y = mx + b\), where \(m\) is the slope and \(b\) is the y-intercept.

Step 2 ：Given that the slope is 0, the equation becomes \(y = b\).

Step 3 ：To find the value of \(b\), we can substitute the coordinates of the point (1,2) into the equation.

Step 4 ：Substituting the values we get \(m = 0\) and \(b = 2\).

Step 5 ：Final Answer: The equation of the line is \(\boxed{y = 2}\).