How to judge the comparison of algebraic expressions with coefficients a, B and C according to the image of quadratic function

How to judge the comparison of algebraic expressions with coefficients a, B and C according to the image of quadratic function

The opening of the image is upward, a is greater than 0, and then look at the symmetry axis: - B / 2a and the size of special points, such as the ratio with 0, the ratio with 1, etc. C is the intersection point with the Y axis. In the positive half axis, C is greater than 0, and the negative half axis is less than zero, and the intersection point with the origin is zero