What is the difference between linear & quadratic equation?

Question

What is the difference between linear & quadratic equation?

Answer 1

I think quadratic has 2 variables or more for the function

Answer 2

A linear equation is one where the solution set can be drawn as a line.  For example, something of the form y = mx + b.  Since m and b are constants, the set of point (x,y) that are solutions to the equation forms a line.  The important difference in the equation is that both x and y are not raised to any powers.

A quadratic equation is one where the solution set can be drawn as a parabola which is a special curve shape.  The equation generally involves either x or y raised to the second power.  For example, something of the form y = ax² + bx + c or x = ay² + by + c where a, b, and c are constants.  

Hope this helps you!