Answer:
Input
Independent variable
Explanation:
we know that
Independent variables, are the values that can be changed or controlled in a given model or equation
Dependent variables, are the values that result from the independent variables
we have the function
![d(t)=50t](https://img.qammunity.org/2020/formulas/mathematics/middle-school/d8ek3l4qzeqabmusqqk828pkbtu63knqbm.png)
In this problem
This is a proportional relationship between the variables d and t
The function d(t) represent the dependent variable or the output
The variable t represent the independent variable or input