Neither. -5*8 = -40 is a constant.
No, it is is a single point.
Yes, 2y = 8 is a linear function. 2y = 8 is the same as y=8/2, or y=4, which is a vertical line.
It is a linear equation in one variable, y.
yes it is one
The system is simultaneous linear equations
there's no equals sign so it's not an equation, it's an expression. i assume you mean (a^2)/(b^8) in which case it's a non-linear expression in both a and b. "linear in x" means the highest power of x in the expression is 1. this means there is no x^2 or x^8 etc. 2x + 4 is linear because the highest power of x is 1 2(x^3) + 4x + 7 is nonlinear because the highest power of x is 3
It is a linear equation with a single variable, y.