It C. and if you need the equation for the area of a parallelogram its A=BH
AAAASSAAAALAKSKSKDKDKDJFJJFJFJFJFJFJF
(2+4+6)*8 hopefully that's what you are looking for
A would be your answer. If we did 220-100 and divide that by 6, you'd get the equivalent of w.
Correct! lines that have undefined slopes are always parallel to the y-axis as the change in x is 0. A gradient is calculated by the change in y divided by the change in x and anything divided by 0 is referred to as undefined.

(calculation for a gradient)
Hope that helps sorry if its a bit confusing :)