What is the constant of proportionality in the equation y= 2/3 x



what is the constant of proportionality = plsss i need to pass math

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

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.

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.