The Falls Incline Railway in Niagara Falls,Ontario,Canada Is an Inclined $a = 170$

Multiple Choice

The Falls Incline Railway in Niagara Falls,Ontario,Canada is an inclined railway that was designed to carry people from the City of Niagara Falls to Queen Victoria Park.The railway is approximately 170 feet long with a 40% uphill grade (see figure) .Using the origin of a rectangular coordinate system as the base of the inclined plane,find the equation of the line that models the railway track.​ ​ $a = 170$ ​

A) $y = 170 x$
B) $y = 0.40 x$
C) $y = 40 x$
D) $y = - 0.40 x$
E) $y = - 170 x$