What is the most precise classification for the quadrilateral shown in the graph below? 1
15
12
1210
FO
Answer using complete sentences and include all relevant calculations to justify the classi-
fication you chose.

the correct answer is 45x

9×5=45 then add the x

, 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

6 and 24

step-by-step explanation:

6 x 4 = 24