
Math Help  Name a Parabola Game  Use Yintercept of Graph LCRD7 Tips:  A ball thrown upwards in still air follows an approximate parabolic arc.  The curve y=4x^{2}+3 is a parabola that opens downwards and has a yintercept of 3.  The curve y=4x^{2}+5 is a parabola that opens upwards and intersects the yaxis at 5.  The second degree (or quadratic) relation y=ax^{2}+b represents a set of ordered pairs (x,y) which form a parabolic shape that passes through the point (0,b). When 'a' is positive, the parabola opens upwards. When 'a' is negative, the parabola opens downwards. Increasing the size of 'a', narrows the width of the mouth of the parabola. When 'a' is zero, the parabola y=ax^{2}+b reduces to the horizontal line y=b.  It may take a minute to load the game at dialup speeds.  The game can be played using the mouse by itself or using the keyboard by itself.  If the game doesn't respond to keyboard input, click inside the game area to reset the game's focus.  Adjust the game's speed by pressing the + or  key repeatedly. 
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