The time it takes to travel to a destination varies inversely with the average speed. It takes two hours when the average speed is 40mph. If the average speed changes to 80mph, what is the new travel time?

4hour.

We are given time takes to travel is inversely with an average speed.

Then,

If average speed is 80mph, let time taken be x:

Hence, it takes 4 hour to travel to a destination with 80mph.

By inverse proportionality,

40/2 = 80/x

40x = 160

x = 160/40

x = 4

So, new travel time is 4 hour.

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation: