Write a function rule for "The output is 10 less than the input." Let x be the input and let y be the output.

y = x - 10

Step-by-step explanation:

10 less than a number is the same as 10 subtracted from the number.

If you start with 30, 10 less than 30 is the same as 10 subtracted from 30.

30 - 10 = 20. The input is 30, and the output is 20, which is 10 less than 30.

If you start with x, 10 less than x is the same as 10 subtracted from x, or x - 10. The input is x. Subtract 10 from the input, or x - 10. The output equals x - 10.

y = x - 10