What is the y intercept of the function f (x) = -2/9x + 1/3 ?? Please help ! :0 :)

What is the value of x in the diagram below?

Which of the following graphs represents the function f(x) = 2^x

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet