X-1 If f(x) =
3
*
and g(x) = 3x+1, what is(fºg)(x)?
2
o (fog)(x) = 3x + 1
o (f•g)(x) = x - 3
o (fog)(x) = 3x
O •
(fºg)(x) = x
= X

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

b.an increase in a causes b to decrease

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).