Respuesta :

The correct answer to this question would be the letter "B" y=50x

 Hope this helps you!! (:
You know y will always be the output, and x will always be the input. Since you only have a rate, with a starting point of 0, you just have to worry about multiplication. They’re going up at a rate of 50, so you would multiply 50 by x.
So B, y=50x.