Find Rate (min^-1) in a generic reaction .....?

Question

3A2---> products, the generic rate law is rate=k[A2]^p
where k is a constant and p = order of reaction
info I have-----
[A2]o ------------time for color change ---------- rate(min^-1)
0.10 -------------------7.50min-------------------------- ______?___

0.20 -------------------2.00min-------------------------- ______?___

0.30 -------------------1.30min-------------------------- ______?___

0.40 -------------------0.90min-------------------------- _______?__

0.50 -------------------0.50min--------------------------________?_

(hint- the reaction order p isnt a whole #)
I know that we are looking for the slope of the line, but it never comes out sraight when I graph it. I tried using
log(rate) = logk` + plog[A] + c I just cant seem to find the slope!
Help please....

Answer 1

2.27