Bob climbs a mountain, but starts below sea level. He climbs the same number of feet each hour. If the function showing his elevation for any hour is y = 850x – 325, what elevation, in feet, did he start at?
A.
325
B.
850
C.
–850
D.
–325
we are given the function y = 850x – 325 in which y is the elevation and x is the number of hours hence time is a function of elevation. In this case, with the given equation, the person starts at -325 since when x is zero, y is -325.
