Awnwer number 3 please please

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

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

Shane can shovel the driveway in 4 hours, but if his sister it would take 2 hours. how long would it take taylor to shovel the driveway alone