Question

Is AB parallel to CD?

Answer 1

You have to evaluate the slopes of these lines. For line AB you have a slope of

`(1 - ( - 3))/(0 - ( - 3)) = (4)/(3)`
For line CD you have a slope of

`( - 1 - ( - 5))/(3 - 0) = (4)/(3)`
Because the slopes are equal and the two lines are not one and the same, they are parallel.