Question

3) Using your graphing calculator, create a graph of the function f(x) = x2 + 4x + 3 What is the vertex? What are the roots? What is the equation of the axis of symmetry?

Answer 1

Explanation:

Input the function f(x) = x^2 + 4x + 3 and graph it (using the calculator) for the interval [-5, 5]. The roots are the x values at which this graph crosses the x axis and are {-3, -1). The axis of symmetry is the vertical line through x = -2.