Answer:
+(1/3), assuming a corerection is made in the equation. (see below)
Explanation:
The formaula provided is not a function. It simply states that f(x) = -(2/9) + (1/3). My response will assume that an "x" was intended after the -(2/9):
f(x) = -(2/9)x+1/3
A straight line have the form y = mx + b. IIt is comprised of the slope of the line, m (-2/9) and the y-intercept b (1/3). The y-intercept is the value of y when x is 0. That would be (1/3). Thus, (1/3) is the y-intercept.