Question 1091407
{{{y=-1.4abs(x)-2.9abs(x)+3.5}}}
{{{y=-3.9abs(x)+3.5}}}
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*[illustration TENT.JPG].
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The x axis is the ground and y must remain positive or equal to zero.
{{{-3.9x+3.5=0}}}
{{{-3.9x=-3.5}}}
{{{x=3.5/3.9=0.897}}}
So the domain is from 
[-0.897,0.897]
and the range is from
[0,3.5]