Answer? To this question please help

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

Savannah talked for 6 minutes on the phone. catherine talked for n minutes. catherine talked 3 times as long as savannah. how long did nathan talk?

1) for the triangle shown, find the value of x. a) 4 b) 6 c) 8 d) 10 e) none of the above 2) for the triangle shown, find the value of y. a) 8 b) 8√2 c) 8√3 d) 16√3 e) none of the above