Question 881764
I'm not sure if you're indicating the absolute value function of x or the floor function (greatest integer). I'll show both.
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Absolute value:
{{{f(x)=abs(x)-5}}}
{{{f(-4.5)=abs(-4.5)-5}}}
{{{f(-4.5)=4.5-5}}}
{{{f(-4.5)=-0.5}}}
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Floor function:
f(x)=[x]-5
f(-4.5)=[-4.5]-5
f(-4.5)=-5-5
f(-4.5)=-10