document.write( "Question 496102: How can I tell whether or not something is a linear function? For example, here's a chart:\r
\n" ); document.write( "\n" ); document.write( "n 1 2 3 4 5
\n" ); document.write( "f(n) 8 15 22 29 36\r
\n" ); document.write( "\n" ); document.write( "Is this a linear function? \n" ); document.write( "

Algebra.Com's Answer #336350 by chessace(471) $\"\"$ $\"About$

You can put this solution on YOUR website!
The ratio of x and y differences is the same:
\n" ); document.write( "In your example, the x differences in sequence are all 1, so it's linear if and only if the y differences are the same in sequence.
\n" ); document.write( "They are all 7, so yes is linear.
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