You may have been thinking about the function $\displaystyle{f{{\left({x}\right)}}}=\frac{{3}}{{4}}{x}\usepackage{cmbright}\Huge\$ . However, in this function, the domain is restricted because the denominator cannot equal 0. In this case, the domain is all real numbers except 0. If you graph the function, you will find that it never crosses the line $\displaystyle{y}={0}\usepackage{cmbright}\Huge\$ . Therefore, the range is all real numbers except 0.