Question

determine whether each of the ff is a linear equation.
1. y=-5
2. x-2y=4

Answer 1

is not x is there in eq 1

Answer 2

x-2y=4
-2y=-x+4
2y=x+4
y=x/2+2
so it is a linear eq

Answer 3

for first
It's the equation of a horizontal line going through the y axis at -5;
therefore it's a linear equation.