...

12. Supposem varies directly as t. If m = 13 whent = 2, then what is m whent = 6.

t changes by a factor of 3 ... so, how would m change if m variesdirectlyas t ?

13. Ify varies inversely as rand y = 9 whenr = 3, then what is y whenr = 9.

r changes by a factor of 3 ... since y variesinverselyas r, wouldn't y change by a factor of 1/3 ?