SOLUTION: An object is thrown in the air. The trajectory of the object us represented by the equation Y=-1/5x²+2x+4. Y is the height of the ball in feet at the horizontal distance of x feet

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: An object is thrown in the air. The trajectory of the object us represented by the equation Y=-1/5x²+2x+4. Y is the height of the ball in feet at the horizontal distance of x feet       Log On


   

Question 853166: An object is thrown in the air. The trajectory of the object us represented by the equation Y=-1/5x²+2x+4. Y is the height of the ball in feet at the horizontal distance of x feet from the thrower.
Complete a table wich models the trahectory of the ball.
Please help I been ive been stuck in this for two days
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
An object is thrown in the air. The trajectory of the object us represented by the equation Y=-1/5x²+2x+4. Y is the height of the ball in feet at the horizontal distance of x feet from the thrower.
Complete a table wich models the trahectory of the ball.
--------------------
y+=+-x%5E2%2F5+%2B+2x+%2B+4
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Pick values for x and find y. Positive x only, negative makes no sense.
----
x = 0, y = 4
x = 0.5, y = 4.95
x = 1, y = 5.8
x = 2, y = 7.2
etc
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Use Excel if you have it.
Here's a table from graph software.
..x.....y
0.00 4
0.25 4.4875
0.50 4.95
0.75 5.3875
1.00 5.8
1.25 6.1875
1.50 6.55
1.75 6.8875
2.00 7.2
2.25 7.4875
2.50 7.75
2.75 7.9875
3.00 8.2
3.25 8.3875
3.50 8.55
3.75 8.6875
4.00 8.8
4.25 8.8875
4.50 8.95
4.75 8.9875
5.00 9
5.25 8.9875
5.50 8.95
5.75 8.8875
6.00 8.8
6.25 8.6875
6.50 8.55
6.75 8.3875
7.00 8.2
7.25 7.9875
7.50 7.75
7.75 7.4875
8.00 7.2
8.25 6.8875
8.50 6.55
8.75 6.1875
9.00 5.8
9.25 5.3875
9.50 4.95
9.75 4.4875
10.00 4