Will give for the data in the table, does y vary directly with x? and if so write an equation for the direct variation.

x= 16,32,48

y= 4,16,16

a. yes; y=2x
b. yes; y=4x
c. yes; y=8x
d. no; y does not vary directly with x

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores