Answer:
3
Step-by-step explanation:
Because in 3xy 3 is the numerical coefficient
Answer:
-6
Step-by-step explanation:
-|6|=-6
A title could be the effect of the amount/number of days on the amount/number of bacteria. For the 2nd The IV is temperature, the DV is Enzyme Activity and a title could be The effect of Temperature on Enzyme activity.