Question

Write the equation of a line in function notation given point (0, -1) and m=-2

Answer 1

$\bf (\stackrel{x_1}{0}~,~\stackrel{y_1}{-1})\qquad \qquad \qquad \qquad slope = m\implies -2 \\\\\\ % point-slope intercept \stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-(-1)=-2(x-0) \\\\\\ y+1=-2x\implies y=-2x-1$