If you move the negative on the left side of the second equation over to the right side, then we can see that the equation is equivalent to [tex]y={-2x} - 13[/tex].
Remember that an equation [tex]y = mx + b[/tex] represents a line with slope [tex]m[/tex] and y-intercept [tex]b[/tex]. Since both equations given have a slope of -2, but have different y-intercepts, they are parallel.
