It is linear because you're just adding numbers. There are no exponents.
Nonlinear
Linear. The only power for the variables is 1.
y = 2x + 1 IS a linear equation!
Without an equality sign the given terms can't be considered to be any kind of an equation.
linear
It is linear.
Nonlinear
No.
A nonlinear equation does not produce a straight line and the exponent is to the second power or more. x square plus 3y =5 is an example of a nonlinear equation.
Linear. The only power for the variables is 1.
If by d2 you mean d squared then it is non linear
5xy+4=9
y = 2x + 1 IS a linear equation!
It is linear in c and non-linear in d. If both c and d are variables, then it is non-linear.
A linear equation.
Without an equality sign the given terms can't be considered to be any kind of an equation.
no