In this diagram, how many points are coplanar with points a, b and r? i was told it was 6, and i chose 2 and got it wrong. can someone explain? answer choices are: 1, 2, 4, 6.

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral

i think it might be a but you might want a second opinion

my guess is

step-by-step explanation:

i think the answer is b x = 1, y = 35/2