What's the difference between constant acceleration and constant speed

Constant speed means covering the same distance in the same amount of time, every time.

Constant acceleration means the same amount of change in speed or direction in the same amount of time, every time.

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

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue