Determine the constant of variation (k) and the equation of variation of the following.
1. y varies directly as x and y=12 when x=4
2. y varies inversely as x and y=6 when x=18
3. d varies jointly as h and g and d=15 when h=14 and g=5
4. a varies directly as b and a=12 when b=8
5. y varies inversely as x and y=3 when x=4
1. y varies directly as x and y=12 when x=4
2. y varies inversely as x and y=6 when x=18
3. d varies jointly as h and g and d=15 when h=14 and g=5
4. a varies directly as b and a=12 when b=8
5. y varies inversely as x and y=3 when x=4
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