Question

Which equation would you use to find out if the two lines in the graph are parallel?

A coordinate graph is shown with 2 lines.Line a passes through a point with the label left parenthesis negative 2 comma 1 right parenthesis and a point with label left parenthesis 1 comma 4 right parenthesis.
Line b passes through a point with label left parenthesis negative 1 comma negative 1 right parenthesis and a point with label left parenthesis 3 comma 3 right parenthesis.
A. start fraction 4 minus 1 over negative 2 minus 1 end fraction equals start fraction 3 minus 1 over 3 minus 1 end fraction
B. start fraction 4 minus 1 over negative 2 minus 1 end fraction equals start fraction 3 minus left-parenthesis negative 1 right-parenthesis over 3 minus 1 end fraction
C. start fraction 4 minus 1 over 1 minus left-parenthesis negative 2 right-parenthesis end fraction equals start fraction 3 minus left-parenthesis negative 1 right-parenthesis over 3 minus left-parenthesis negative 1 right-parenthesis end fraction
D. start fraction 1 minus left-parenthesis negative 2 right-parenthesis over 4 minus 1 end fraction equals start fraction 3 minus 1 over 3 minus 1 end fraction