I'll give you a pdf so you can see it yourself and the correct answer is -32b - 32b
The base length is 27 cm.
area of a parallelogram is A=b*h
plug in the known area and height into the formula: 513=19*b
divide off the 19: b=27
It's be a line that crosses the y-axis at (0,7) and has a slope of -3 or -3/1.