Video Transcript
Identify the π¦-intercepts of the
quadratic function π of π₯ equals π₯ squared minus one.
The quadratic π of π₯ equals π₯
squared minus one is in the form π of π₯ equals ππ₯ squared plus ππ₯ plus π. In this form, the π¦-intercept is
located at the point zero, π. The coefficient of π₯ squared, π,
equals one. The coefficient of the π-term
would be equal to zero; we donβt have an π₯-term. And our π-value is equal to
negative one. Using this method, we find a
π¦-intercept at zero, negative one. Additionally, of course, we know
that the π¦-intercept is the place that the graph crosses the π¦-axis. And if we look closely at this
graph, that is halfway between zero and negative two, where π¦ equals negative
one.