Four of 12 people choose milk what fractional part of the group chose other drinks

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.