Hàm số đã cho : \(y=f\left(x\right)=\dfrac{3}{4}x\)
\(f\left(-5\right)=\dfrac{3}{4}.\left(-5\right)=-\dfrac{15}{4}=-3,75\)
\(f\left(-4\right)=\dfrac{3}{4}.\left(-4\right)=-3\)
\(f\left(-1\right)=\dfrac{3}{4}.\left(-1\right)=-\dfrac{3}{4}=-0,75\)
\(f\left(0\right)=\dfrac{3}{4}.0=0\)
\(f\left(\dfrac{1}{2}\right)=\dfrac{3}{4}.\dfrac{1}{2}=\dfrac{3}{8}\)
\(f\left(1\right)=\dfrac{3}{4}.1=\dfrac{3}{4}=0,75\)
\(f\left(2\right)=\dfrac{3}{4}.2=\dfrac{3}{2}=1,5\)
\(f\left(4\right)=\dfrac{3}{4}.4=3\)
\(f\left(a\right)=\dfrac{3}{4}.a=\dfrac{3}{4}a\)
\(f\left(a+1\right)=\dfrac{3}{4}.\left(a+1\right)=\dfrac{3a+3}{4}\)