Blue Book, pg 361, help

hmhanh
Fri, 23 Jan 2009 06:15:11 +0000

For #7 on pg 361, there’s probably a faster way:
since u know the slope of a line is:
(the change in y between any 2 points on the line)/ (the change in x between the same 2 points on that line)
Hence:
(y-0.5)/ (4-0)=1/4
–> y= 3/2

Can anyone solve page 340 /No.15 (the parabola one) for me! Thks in advance ^