Question

Javier made a scatterplot to show the data he collected on the growth of a plant.



image.png

Which equation BEST represents Javier’s data?


y
=
3.25
x


y
=
x
+
3.25


y
=
3.25
x
+
4.60


y
=
4.60
x
+
3.25

Answer 1

y = 3.25x + 4.60

Reason: the points line up with an initial height (y-intercept) of about 4.60 and increase about 3.25 units in y for each 1 unit increase in x. For example, between (0, 4.60) and (2, 11.10) the slope is (11.10 − 4.60)/2 = 3.25, giving y = 3.25x + 4.60.