8. Colleen waters the plants in her greenhouse once every day. She wants to find out if the plants will grow more leaves if they are watered more
often. She counts the number of leaves on each plant before she starts.
She then continues to water half of each type of plant once daily, but she
waters the other half of each type twice a day. What is the outcome
variable in Colleen's experiment? *
the amount of light the plants receive
the number of leaves the plants grow
the number of times the plants are watered
the type of plant being grown
H