Question 8: I Can Write the y=mx Form Equation of the Line. A train traveled 120 miles in 3 hours. The train traveled at a constant speed. If the
train continues to travel at this rate, which equation can be used to determine y,
the total number of miles the train will travel, in x hours?
A. y = 40x + 20
B. y = 40x
C. 40y = x
D. 40 + y = x

b

Step-by-step explanation:

120/3 = 40

40 miles in 1 hour

B. y = 40x

Step-by-step explanation:

120 miles in 3 hours, that means every hour the train traveled 40 miles.

the final function for the graph becomes x-2=-1. before graphing you solve the equation, where x=1. then graph accordingly.   ( on the x-axis, 1 on the line will possess a vertical line.)

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50