How to find c in quadratic formula when only given 2 points?

Question

A parabola with the equation y=x^+by+c passes through the points (2,3) and(4,3). What is C?

Answer 1

Teddy's method for given two points is for y=mx+c, a straight line. It is not a quadratic formula.
Any college algebra book will help.
y=ax^2+bx+c, you might have 2 equations and three unknowns, a,b,c.

Answer 2

first find the gradient by
(y2 - y1)/ (x2 - x1)

where your points are (x1, y1) and (x2, y2)
sub gradient = m into
Y=mX+c

solve to find c ;)

hope that helped!

Answer 3

use the formulae. plug the a's and b's in