Posted by **ladybug** on Thursday, October 25, 2012 at 10:27pm.

y=3x/x^2 + 81

for the given equation, list the intercepts and test for symmetry.

- college algebra -
**Reiny**, Thursday, October 25, 2012 at 10:46pm
You have posted many times, and by now you should know that you will NEED brackets for equations like this to establish the proper order of operation.

I am sure you meant to type:

y = 3x/(x^2 + 81)

when x = 0, y = 0/81 = 0, so the origin is both a y and x intercept

subbing in a positive x will yield a positive y

subbing in a negative x will yield a negative y

but the absolute value will be the same

also , notice that f(-x) = -f(x)

e.g. x = 1, then y = 3/82

if x = -1 , y = -3/81

so there is a reflection in the origin.

- college algebra -
**ABN Tee**, Sunday, October 28, 2012 at 11:02am
The height h(t), in feet, of an airborne tee shirt t seconds after being launched can be approximated by h(t) = - 15t^2+10, 0-<t-<. Find the times when the tee shirt will reach a fan 190 feet above ground level. The tee shirt will reach the fan at how many seconds?

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