QuestionFor the quadratic function $f(x)=x^{2}+2 x+1$, answer parts $(a)$ through ( $f$ ). (Type an ordered pair, using integers or fractions.) What is the equation of the axis of symmetry? The axis of symmetry is $x=-1$. (Use integers or fractions for any numbers in the equation.) Is the graph concave up or concave down? Concave down Concave up (b) Find the $y$-intercept and the x-intercepts, if any. Select the correct choice below and, if necessary, fill in the answer box to comp your choice. A. The $x$-intercept(s) is/are -1 . (Type an integer or a simplified fraction. Use a comma to separate answers as needed.) B. There are no x-intercepts.
What is the y-intercept? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The $y$-intercept is 1 . (Type an integer or a simplified fraction.) B. There is no $y$-intercept. (c) Use parts (a) and (b) to graph the function.
Use the graphing tool to graph the function. - $\square$ (d) Find the domain and the range of the quadratic function.
The domain of $f$ is $(-\infty, \infty)$. (Type your answer in interval notation.) The range of $f$ is $[0, \infty)$. (Type your answer in interval notation.) (e) Determine where the quadratic function is increasing and where it is decreasing.
The function is increasing on the interval $\square$ (Type your answer in interval notation.)