Question 61001
f(x)=x-7 x=-2 f(-2)=-2-7  f(-2)=-9
f(x)=-x+4 x=4 f(4)=-4+4 f(4)=0
f(x)=2x+6 x=-3 f(-3)=2*-3+6 f(-3)=-6+6 f(-3)=0
f(x)=1.5x-42 x=-9 f(-9)=1.5*-9-42 f(-9)=-13.5-42 f(-9)=-55.5
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