<span>f(x) = –2/9x + 1/3
</span>y -intercept when x = 0
so
f(x) = –2/9(0) + 1/3 then f(x) = 1/3
answer
<span>y-intercept </span>(0, 1/3)
Given:
The demand function is,

The total revenue function is,

Answer:
X/4=160R2 X=642. I hope I helped you out. 160x4=640+2=642.