Cara can paint 3 walls in 4 hours. how much time will she need to paint 6 walls?

8 hours because 6 is doubled 3 so you multiply 4 by 2 and get 8!!
Hope this helps

She'll need 8 hours.

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for