Anyone please helpp me

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.

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

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?