Question

After a car left the A station for 4 kilometers, it advanced for an hour at an average speed of 40 km/h. Find a functional relationship between the distance s (km) and the time 1 (hour) when the car left the station A.
Answer+Explanation. Thx :)

Answer 1

The function would be f(x) = 40x + 4.

It's plus 4 because it starts counting after the 4 kilometers already happened.

It's 40x because that's the rate of change (km/h) and the x represents the hours.

f(x) basically means y, but in functions you use f(x).

Hope this helps :)