not a clue
let and be two propositional statements.
the disjunction is true if either or is true or both are true.
in the given options;
the correct answer is d
here x =time logged in and hence cannot be negative
so domain = [0,∞)
where here independent variable is distance the dependent is his jogging time.
even when x=0, f(x) =50
so domain is [50,∞)
here independent variable is daily earnings and dependent variable is her computer sales in dollars
here domain =[0,10] (given)
in the inverse independent variable is distance travelled and dependent is time in seconds.
here independent variable is total money earned and x number of tickets sold