Which option is an example of an experiment?
a. recording the reaction time of participants in a study who were
asked to press a button as soon as they see a certain picture on a
screen
o
b. testing the effect that eating organic food has on health by having
a group of people selected at random eat organic food for six
consecutive months and then comparing the results with a group
of people who didn't eat any organic foods during the same period
o
c. asking students in a school how much time they spend exercising
o
d. polling teenagers about their screen time in a day

B. Testing the effect that eating organic food has on health by having

a group of people selected at random eat organic food for six

consecutive months and then comparing the results with a group

of people who didn't eat any organic foods during the same period

1     sepan

2     encuentren

3     tenga

4     hable

5   parezca

6   llegue

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.