Please answer this correctly

He letter p on the number line below represents the number . (use the hyphen for negative numbers and write answer as a decimal, such as –7.2) number line from negative 7 to positive 7 in increments of 0.5 is shown. only the whole numbers are labeled. a point labeled p is placed at the eleventh tick mark to the left of 0.

Write a function rule for  “the output is  5 less than the input.” let  xx  be the input and let  yy  be the output.

The functions f(x) and g(x) are described using the following equation and table: f(x) = -3(1.02)*