Answer
See below.
Work Step by Step
All polynomials have a y-intercept at $y=f(0)$, but some functions don't have x-intercepts, e.g. $f(x)=x^2+c$, where c is positive.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.