Answer asap if you know them i need help with all 4

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Elizabeth is using a sample to study american alligators. she plots the lengths of their tails against their total lengths to find the relationship between the two attributes. which point is an outlier in this data set?