Finding the Y-Intercept

To find the y-intercept from the from the equation of the polynomial set x equal to zero.

Example 1:

Example 2:

Example 3:

To find the y-intercept using the graphing calculator first press the Y= button, type the equation into Y1=, press the GRAPH button, press the 2nd button and the TRACE button, press 1:value, make X=0 then press ENTER.