A submarine that is 7500 meter below sea level surfaces at a rate of 80 meters per minute. The depth of the submarine after m minutes is given by d(m)=-7500+80m. Graph this function.
The function can be written as follows;
d(m) = -7500+80m
m is same as x in a y = mx+c notation for a line.
80 represent the gradient m in a y = mx+c notation for a line.
-7500 represent c in a y = mx+c notation for a line.
So for the graph data is as follows.
y = d(m)
x = m
m = 80
c = -7500
y = 80m-7500
The range of y is -7500 to 0.
When y = -7500 then x = 0
When y = 0 then x = (0+7500)/80 = 93.75