Question

M = 0 passing through p(-2, -7)

Answer 1

$\bf \begin{array}{lllll} &x_1&y_1\\ % (a,b) P&({{ -2}}\quad ,&{{ -7}}) \end{array} \\\\\\ % slope = m slope = {{ m}}= \cfrac{rise}{run} \implies 0 \\\\\\ % point-slope intercept \stackrel{\textit{point-slope form}}{y-{{ y_1}}={{ m}}(x-{{ x_1}})}\implies y-(-7)=0[x-(-2)] \\\\\\ y+7=0(x+2)\implies y+7=0\implies \stackrel{standard~form}{y=-7} \\\\\\ \textit{or you can also say}\qquad 0x+y=-7$