Is y = 0.25 + 0.5 (x-2) linear or non linear?

And this equation also

Y = x (3-x) + 1

it is non linear

Step-by-step explanation:

Because x and y here both have the exponent 1, we know that y = 0.25 + 0.5 (x-2) is linear.

Expanding Y = x (3-x) + 1, we get y = 3x - x^2. Because the highest power on the independent variable (x) is 2, this equation is quadratic (not linear).