Does a 650nm and 35km wave travel at the same speed?

Yes they do, if they're both electromagnetic waves and both traveling through the same medium.

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more