Question

http://www.webassign.net/scalc/4-3-6.gif
On what interval(s) is f increasing?

Answer 1

in other words what intervals is f rising

Answer 2

read the graph from left to right

Answer 3

oh that is f' in the picture?

Answer 4

yes

Answer 5

f'>0 then f is increasing
f'<0 then f is decreasing

Answer 6

when f' is above the x-axis, f is increasing

Answer 7

what is the first interval where you notice f' is above the x-axis?

Answer 8

(2,4)

Answer 9

yes so f is increasing on (2,4) because f'>0 on (2,4)
there is a second interval where f is increasing (or where f'>0)

Answer 10

what other interval falls above the x-axis

Answer 11

(6,9)

Answer 12

well assuming this graph actually ends at x=9 yeah

Answer 13

but if that graph actually continuous
then (6,inf)

Answer 14

continues*

Answer 15

i guess i will assume it stop at x=9 and
you would say (2,4) union (6,9)
you can use the symbol for union

Answer 16

thanks!

Answer 17

np