Triangular numbers can be represented with equilateral triangles formed by dots. the first five triangular numbers are 1, 3, 6, 10 and 15. is there a direct variation between a triangular number and it’s position in the sequence? explain your reasoning

variation is y = kx  where y  would be the value of the number and x would be its position in the sequence, k is a constant 

so for consecutive values y/x would be a constant k 

In this case its not true becuse for example  3/1 = 3 and 6/3 = 2 

so there is no direct variation here.

in general, fiction refers to plot, settings, and characters created from the imagination, while nonfiction refers to factual stories focused on actual events and people. however, the difference between these two genres is sometimes blurred, as the two often intersect.

explanation:

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