The graph shows a trip taken by a car where t is the time(In hours) and y is the distance(in miles) fro Phoenix. A) How far from Phoenix was the car at the beginning of the trip?

B) What was car’s speed?

C) How long did the trip last?

D) How far from Phoenix was the car at the end of the trip?

Would appreciate answers!

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for