anonymous
  • anonymous
what is the domain and range of the abstract function y=-18x^2+310x+90? Pleae helpp
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Hero
  • Hero
When finding the domain or range of a function, you usually begin by attempting to figure out what the limiting values are for x and y. In other words, what values, if any, will cause the function to give a result that is undefined, indeterminate, non-real.
Hero
  • Hero
@jjbaby110, do you know if there is any value of x that may not work for the given function?
anonymous
  • anonymous
No, but there is an ordered pair. It's (8.6,1424.7).

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Hero
  • Hero
You must have graphed the function using a graphing calc. Yes, that is probably an ordered pair of values that work.
Hero
  • Hero
Basically, what we are dealing with here is a quadratic function. And in general, quadratic functions have a domain that includes all real numbers.
Hero
  • Hero
Which means, you could input any value of x and get a valid y value.
Hero
  • Hero
However, just from graphing the function, you can observe that along the y-axis, there exist values that do not include the function.
anonymous
  • anonymous
I have to write it in interval notation and none of this makes sense to me. My math teacher doesnt speak english so
anonymous
  • anonymous
|dw:1378233133419:dw|
anonymous
  • anonymous
the graph with the question looks kind of like this.
anonymous
  • anonymous
Domain is All Reals Range is {y element R : 18 y<=25645} You looked like you were having trouble.
Hero
  • Hero
@zkrup, don't just give the answer, explain the process..if you're going to do it. .

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