Me i dont translation (x,y)→(x−6,y+8)

Pretty much, you would just take all of the points on the graph and subtract 6 from the x value and add 8 to the y value. This would be the result of the translation. For example, if a point on the graph was (3, 4), the result after the translation would be (-3, 12). Hope this helps!

We have to find the growth rate of certain Patch of ground, which is covered by certain plant.

As, the branches of Herb patch plant can't grow more than 150 cm.

The difference in height can't be calculated on daily basis.It should be calculated either in a duration of three to four days ,or in a week.

Now, if you look branches of plant it occupies some space,that is area it's unit should be either Square cm or Square meter.

So, the appropriate unit to measure the growth rate will be

or