Complete the tables for y=2^x and y=log base 2 x+3

y=2^x
x -2, -1, ?, ? 2.
y 0.25, ? 1 2 ?

y=log base2 x +3
x ?, ?, ?, 1, ?
y 0, 1, 2, 3, 4.

so what is your question about this problem?

x^-2= 1/x^2= put x in and compute