Question

Which does NOT represent a constant rate of change of 70 miles per hour for a car? Question 4 options: The car travels 245 miles in 3.5 hours. The car travels 140 miles in 2 hours. d = 70t, where d represents distance in miles and t represents time in hours. d = 70t, where d represents distance in kilometers and t represents time in hours.

Answer 1

Answer:

The answer is fourth option that is $d=70t$ where d represents distance in kilometers and t represents time in hours.

Step-by-step explanation:

Given is that rate of change is 70 miles per hour for a car.

In option 1, option 2 and option 3 same rate is there and also we know $Rate = \frac{Diistance}{Time}$

For first we have $\frac{245}{3.5}$= 70 miles per hour

For second we have $\frac{140}{2}$= 70 miles per hour

For third we have $d=70t$

                            ∴   $\frac{d}{t} =70=\frac{distance}{time} =Rate$

And the Fourth  one is NOT representing the same Because its distane unit is in Kilometer while others were in miles

Answer 2

Answer:

Step-by-step explanation:

Train B is faster because if u multiply 70*2 is 140 70*4 is 280 70*5 is 350 so train B