The table shows the first four triangular numbers. 1
2
3
4
1
3
6
10
The sixth triangular number is

C. i think it is step 3

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for