## Elementary Algebra

$y=-7$
Using $y-y_1=m(x-x_1)$ or the Point-Slope Form, the equation of the line with the given point $( 3,-7 )$ and slope $m= 0$ is \begin{array}{l}\require{cancel} y-(-7)=0(x-3) \\\\ y+7=0 \\\\ y=-7 .\end{array}