HELP ASAP I'LL GIVE BRAINLIEST ITS TIMED

The amount of energy it takes to lift a box might be a function of which of the following

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.