SOLUTION: When you graph a quadratic function and find the vertex is on the Y-axis, you know for sure that? I think that we know for sure that the coefficient of the x term ("b") is zero; O

Question 48215: When you graph a quadratic function and find the vertex is on the Y-axis, you know for sure that?
I think that we know for sure that the coefficient of the x term ("b") is zero; OR
The roots of the equation is the positive and negative of the same number (+p and -p).
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Well, the answer is one or both of the above.
If the vertex of the parabola is on the y-axis, then, if the parabola intersects the x-axis, it does so at +x and -x and the coefficient of x (b) is 0.
If the parabola doesn't inersect the x-axis, but the vertex is on the y-axis, then the coefficient of x (b) is 0.
See the graphs below of (red) and (green):

RELATED QUESTIONS
Ernie Thayer1 hits a baseball and it travels for 409.6 feet before it lands. When he hits (answered by richard1234)

Quadratic Functions and Equations The first question I gave it go at. Solve.... (answered by richwmiller,solver91311)

We have to graph y=-5+4 sin 1/3(x+pie/2) I know that 4 is the y axis for the graph and... (answered by ewatrrr)

Could you please help me with this problem? I am given the function f(x)= x^2 + 2x + 6... (answered by solver91311,Theo)

Q: Find the area A of the largest rectangle with base on the x-asix that can be inscribed (answered by Theo)

how do you find a and b and c of a quadratic equation? I have data that is: when x is (answered by stanbon)

What is the quadratic function that has a vertex at (-1,-3) and a y-intercept of -4? I... (answered by ankor@dixie-net.com)

Make a graph that shows when fahrenheit and celsius meet. I don't know what the x-axis or (answered by rfer)

algebra 2 write an equation for the line with the given info. pts (3,5) (5,12) I know... (answered by jim_thompson5910)