A scientist is studying bacteria in a lab. She begins with 3 bacteria in
her tray. She observes that the
bacteria triples every day.
Model the bacteria growth over
one week (7 days). How many
bacteria will be in the tray by the
end of the week?

3; 9 is 8 to -4

step-by-step explanation:

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.

yes

step-by-step explanation:

yes

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4