Well in THAT case it would be C. because it is a PROGRAM, and PROGRAMS are softwares on computers ;)
C. 3.5
You have to go to -2 on the “X axis” and find the corresponding “Y” value on the line.
13
14=2•7
15=3•5
16=2•2•2•2
17
18=2•3•3
19
20=2•2•5
...
