I believe that it is a waxing gibbous and a waxing crescent
I believe that the perpendicular equation would be the opposite sign and the reciprocal of the original slope. Then you just plug in the x and y coordinate to y=mx+b and solve for b.
y=4x+b
3=4(-4)+b
3=-16+b
b=19
y=4x+19
There would be 3 different types of materials that may be prone to liquefaction, which are; Sandy, Silty, and Gravelly Soils. Hope this helped! :}
