01:Posttest Functions, Linear Equations and Graphs
1 answer:
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Replace f(x) and f(x+h) by using the equation given for the problem.
Open all parenthesis
Factor the h
Other terms not in the parenthesis cancel each other out
Now, simplify
Answer:
Step-by-step explanation:
The table shows how the time it takes a train to travel between two cities depends on its average speed.
function models the time, y, in hours, that it takes the train to travel between the two cities at an average speed of x miles per hour
y represents the time
and x represents the average speed
WE know distance = speed * times
LEts find the distance using the table
distance = 32* 5= 160
40*4= 160
50*3.2 = 160
Time = distance / speed
times is y , distance is 160 and speed is x