Is y = a x^2 + b x + c a quadratic function?

Thats the form of a quadratic formula, but the a, b, and c are filled by a number constants to be an equation that is solvable if that makes sense.

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!