It is a quadratic equation that has 2 solutions
It is linear in y, quadratic in x. Generally, that would be considered a quadratic.
It is the linear equation of a straight line.
No it is a linear one. X^2 = quadratic, x = linear. So if the equation doesn't have an x squared, then it is not quadratic.
Two equations: a linear one in y and a quadratic in x.
No. It's a quadratic equation, and it has two solutions.
No, It's a a quadratic equation because you have X squared.
No, y=x^2 + 2 is a quadratic equation. A linear equation is one in the form y=mx+b. A quadratic has a form y=ax^2+bx+c.
It is either a linear equation in a variable ww or a quadratic equation in a variable w, (with ww denoting w2).
Neither. It is a family of hyperbolae.
no only equations with x2 and lower powers can be considered quadratic. those with x3 cannot be considered quadratic, just as x2 cannot be considered linear
X equals 0.5at squared is a quadratic equation. It describes a parabola. Y equals mx plus b is a linear equation. It describes a line. You cannot describe a parabola with a linear equation.