We want to select option 1: value.  After selecting this option, we obtain the 
following: 
 
 
After the X=  type 0 and press enter to obtain the following:  
 
 
Thus, when x = 0, y = -8. 
 
We can use the ZERO feature on a TI-83 to determine the x-intercepts of the graph of the 
equation.  Again, go to the CALC menu, but this time select option 2: ZERO. 
 
 
The calculator asks for a LEFT BOUND - this is a value of x to the left of the x-intercept.  
To establish the left bound use the left and right arrows to move the cursor until it is left 
of the x-intercept you wish to approximate, then press ENTER. 
 
x-intercept