Determine whether the following statement refers to univariate (single-variable) or bivariate (two-variable) data:
Jen measured the height and number of leaves of each plant in her laboratory.
Linda recorded the weight of each of her cats.
Roberto observed the color and model of each car in the parking lot.
Luigi found the shoe size of each of his customers.
Kenny wrote down the length of each song.
Make it rain.
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