Question 889619
The format of the points is ( x,y )
To be a function, there must be a single value
of {{{ y }}} for any given {{{ x }}}
This appears to be true
so, it's a function
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The smallest {{{ x }}} is {{{ -4 }}} ( the point (-4,0) )
The largest {{{ x }}} is {{{ 3 }}} ( the point ( 3,-1)
So the domain is
 {{{ 3 - (-4) = 7  }}}
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The smallest {{{ y }}} is {{{ -4 }}} ( the point (1,-4) )
The largest {{{ y }}} is {{{ 4 }}} ( the point ( 0,4) )
So, the range is
{{{ 4 -(-4) = 8 }}}