Which exponential function has an initial value of 2? f(x) = 2(3x) on a coordinate plane, an exponential function approaches y = 0 in quadrant 2 and increases into quadrant 1. it crosses the y-axis at (0, 0.5) and goes through (2, 2). f(x) = 3(2x) a 2-column table has 5 rows. the first column is labeled x with entries negative 2, negative 1, 0, 1, 2. the second column is labeled f (x) with entries one-eighth, one-fourth, one-half, 1, 2.