B. 9^2
explanation: 3^4 is equivalent to 3*3*3*3, which is 81
9^2 (9*9) also equals 81
The nearest 10 is 50 and the the nearest hundred is 900
the answer is 16 because .80 times 20 is 16
The slope for the graph is 2/3 and for the equation the slope is 3/2
