Parabolas (1.2.3)

Question 1

• The graph of a second-degree polynomial expression is a parabola. A parabola consists of the set of all points in a plane that are equidistant from a fixed line (the directrix) and a fixed point not on the line (the focus).

Answer 1

• The graph of a second-degree polynomial expression is a parabola. A parabola consists of the set of all points in a plane that are equidistant from a fixed line (the directrix) and a fixed point not on the line (the focus).

Question 2

• When graphing functions, start by looking for ways to simplify their expressions. Always promise that the denominator will not equal zero when you cancel.

Answer 2

• When graphing functions, start by looking for ways to simplify their expressions. Always promise that the denominator will not equal zero when you cancel.

Question 3

• The distance formula is an application of the Pythagorean theorem.

d=sqrt((x2-x1)^2 + (y2-y1)^2)

Answer 3

• The distance formula is an application of the Pythagorean theorem.

d=sqrt((x2-x1)^2 + (y2-y1)^2)