A linear set of numbers is what that increases or decreases by a constant. For example, the set: {1,4,7,10,13,16} is a linear set that increases by the constant of three. A linear set can also decrease by a constant. The set: {20,15,10,5,0,-5,-10} is a linear set that decreases by the constant of five.

A non-linear set increases or decreases by a factor or an exponent, not a constant. The set {1, 10, 100, 1000, 10000} increases by a factor of 10. The set: {2, 4, 16, 256} is a non-linear set increasing by the exponential value of 2. That is, each value in the set is the square of the preceding value.

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