Determine whether each relation is a function. explain. y=1/2x-6

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

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.

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?