2,736*57 I need a lot of help

What is the slope of a line that is perpendicular to y = 3x + 1

Will give brainliest summations with algebraic expressions image shown

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?