The standard form of expressing a linear equation is,
[tex]\begin{gathered} y=mx+b \\ m=\text{slope} \\ b=y-\text{intercept} \\ \text{Substitute for the given values, and you have;} \\ -3=3(-1)+b \\ -3=-3+b \\ -3+3=b \\ b=0 \\ \text{Having calculated the values of m and b, we now have;} \\ y=3x+0 \\ y=3x \end{gathered}[/tex]The equation of the line is;
y = 3x
