Answer:
11/2
Step-by-step explanation:

Answer:
(y2-y1)/(x2-x1)
Step-by-step explanation:
Using two coordinates, you can just plug in the corresponding (x,y) coordinates and you will get the slope, which is the rate of change over an interval
A kg is 1000 grams, so you would 1000*4.
It is just asking you what the y-value is when x=6. In this case it is about 2.5