Question

The following graph shows the percentage of people in a certain country who have ever purchased anything online for the period January 2000-January 2002 (t = 0 represents January 2000): a = 10 b = 20 c = 30 (a) Estimate the average rate of change of P(t) over the interval [0, 2].

Answer 1

Okay I thought I had this one figure out easily, but I'm not coming up with the correct answer. I'm using P(0) - P(2) / 0-2 for my formula. However, for my P(2) I'm not given what it equals?? I tried estimating it was about 40, but plugging that in didn't come up with the correct answer . . . so now I'm stuck . . . help. >_<

Answer 2

average rate of change is just the slope between end points

Answer 3

just by looking it goes up by 3 and over by 2; but that 3 is disguising something

Answer 4

its 3*10 = 30

so the average rate of change is 30/2 = 15

Answer 5

each step up is 10 steps according to what they give you right?

Answer 6

No, thats not correct. 15 is the answer I got the first time I tried it. And yes thats what I assumed, 10 up according to a, b, and c. However that last point on 2 is what's causing all the trouble.

Answer 7

yeah i see it now; each step is 5 not ten

Answer 8

notice that there are 2 steps between letters

Answer 9

5?! O_O

Answer 10

5*3 = 15

15/2 = 7.5

Answer 11

AMG >_<

Answer 12

7.5 it is ;)

Thanks amistre . . . not paying attention to lines on the graph for the lose. >_<