# Algebra2

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a graph with the points (0,-3) (2,-4) (-2,-4)

What would be the domain, range x-intercepts y-intercepts and funtional value..

• Algebra2 - incomplete -

just given three points, there's no way to tell anything in general about the function. All we know is

the domain includes {-2,0,2}
the range includes {-4,-3}

y-intercept at y = -3
no x-intercept given

there are many functions which contain these three points:

y = -|x/2| - 3
y = 1/2 cos(π/4 x) - 3.5
y = cos(π/2 x) - 3
y = -x^2/4 - 3
y = 1/4 x^4 - x^2 - 3
and so on

• Algebra2 -

Thanks?..
Same Type of question...

cAn you tell me if these are maybe right?..

1. points of (2,2) (-1,4) (2,6)

Domain:(-4,2,6)
range:(2,2)
xIntercept: none
y-Intercept: none
functional value: x^2+2

• Algebra2 -

domain: {-1,2}
range: {2,4,6}
domain is the x-coordinate (1st value)
range is the y-coordinate (2nd value)

f(x) is certainly not x^2 + 2
(-1)^2 + 2 = 3, not 4
(2,6) fits, but (2,2) does not.

In fact, since (2,2) and (2,6) contain the same x-value, but different y-values, these pairs are not even a function.

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