I am in 8th grade and we are sutdying quadratic functions. How do you graph quadratic equations? How do you find the vertex, x intercepts, y intercept, axis of symmetry, without using a graphing calculator?
Graphiin the X intercept: Substitute 0 for X and you will find where it crosses the Y.
Graphing the Y Intercept: Substitute 0 for Y, then factor the right side. You will set your quantities equal to zero and find where it crosses the X axis.
To find the axis use this formula: x = -b/(2a)
To find the vertex, use the value from the formula above to give you the second part of the ordered pair.