Help Pls I need help look at the picture below

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

Graph the line with the given slope m and y-intercept b. m=-3,b=1