An artist painted a mural measuring 9’ x 20 1/2’ find the area and perimeter of the mural

Plz i beg u asap ! what is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Can someone me do math because i am having a breakdown rn because i don’t get it