This needs to be broken down to find the y-intercept
After graphing, I found it was -3, but how do you find that besides graphing?
y = 2 ( x + 1/4)^2 - 25/8
Remember.....the y intercept point has an x value = 0.....so...let x = 0....and we have
y =2 (0 + 1/4)^2 - 25/8
y = 2 (1/4)^2 - 25/8
y = 2 (1/16) - 25/8
y = 1/8 - 25/8
y = -24/8 = -3 ....just as you found, LF !!!!
Thank you!! I get it!!
+273 
