anonymous
  • anonymous
Precalculus help please?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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jim_thompson5910
  • jim_thompson5910
Draw a vertical line through x = -2 where does this vertical line cross the red curve?
anonymous
  • anonymous
I already know part a is 1, -1, 3, 4 but I don't understand part b, c, or d

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jim_thompson5910
  • jim_thompson5910
b) the domain is the set of allowed x values so basically you state all of the x coordinates of each point as one big set
jim_thompson5910
  • jim_thompson5910
the range is the possible set of y values that can be outputs of the function
jim_thompson5910
  • jim_thompson5910
does that make sense?
anonymous
  • anonymous
So the domain is [-3,4]?
anonymous
  • anonymous
and the range is [-1,4]?
jim_thompson5910
  • jim_thompson5910
very nice
jim_thompson5910
  • jim_thompson5910
both are correct
anonymous
  • anonymous
okay, what about part c and d?
jim_thompson5910
  • jim_thompson5910
h(x) = 3 is the same as saying y = 3 draw a horizontal line through y = 3. Where does it cross the red curve?
anonymous
  • anonymous
2
jim_thompson5910
  • jim_thompson5910
I see two points. What are those points?
anonymous
  • anonymous
oh, -3 also
anonymous
  • anonymous
so would I just write -3 and 2? Or is there a special notation?
jim_thompson5910
  • jim_thompson5910
well they just want x values, so that works
jim_thompson5910
  • jim_thompson5910
actually there's one point I missed
anonymous
  • anonymous
4?
jim_thompson5910
  • jim_thompson5910
yeah so if the input is x = -3, x = 2, or x = 4, then the output is 3
anonymous
  • anonymous
okay, and for part d is it -3, -2, 0, 2, 4?
jim_thompson5910
  • jim_thompson5910
you'll need to use inequalities here
anonymous
  • anonymous
um okay, so -3<=x<=2 and x=4?
jim_thompson5910
  • jim_thompson5910
much better
anonymous
  • anonymous
Thank you so much @jim_thompson5910 ! You've been helping me with math for years and I'm in college now and my Professor speaks very broken English :(
jim_thompson5910
  • jim_thompson5910
I'm glad to be of help, and I'm sorry you and your teacher have a communication gap

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