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| quadratic equations |
crimsonkristin |
10/05/04 |
Hi, I don't know if this is the right place to be asking this but I need help so badly. I'm having to look at graphs of parabolas and determine the axis of symmetry, coordinates of the vertex and the x-intercepts and the domain and range. I know that the axis of symmetry is the x coordinate of the vertex coordinates so I kind of got that. I don't understand how to get or what the domain and range is. I don't know how to get any of the above, coordinates or axis of symmetry of a parabola that is in the the middle of a graph and not touching the axis at all. I don't have a clue what to do or where to go from there. I just need help figuring out how to do them, what they are, tricks, how to recognize each one and apply them to different graphs. I'm also have trouble graphing quadratic equations, such as y=x^2+2x-48 and finding again the coordinates of the vertex, equation of the axis of symmetry, the x and y intercepts and mainly the window settings I'm not getting those.
Also using a TI-83 Plus to do the formula h = -4.9r^2 + 25t, and graph that and then find the maximum height, to adjust the window settings properly, do find out of how long it took to get at the maximum height, how many seconds the ball was in the air, and to estimate the domain and range. I don't understand of this and I need help to understand and figure how to do it and where to go and what to do. Please if anybody can help I'd appreciate it so much. Thank you in advance. |
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