Question

identify the dependent variable: a study was done to find if different tire treads affect the braking distance of a car
1 the car
2 the distance the car took to brake
3 the different tire treads

Explanation:

In an experiment, the dependent variable is the one that is measured or affected. Here, the study is about how tire treads (independent variable) affect braking distance. So the braking distance (the distance the car took to brake) is what's being measured as it depends on tire treads. The car is not a variable, and tire treads are the independent variable.

Answer:

1. The distance the car took to brake