The graph between the log K versus 1T is a straight line. The slope of the line is:
K=Aoe−EaRT
Taking log on both sides
2.303 logK=2.303log Ao−EaRT
log K=logAo−Ea2.303R×1T
Let log K=y, 1T=x
y=log Ao−Ea2.303Rx
Slope =−Ea2.303R