Whichfunction increases by 1/3every time x-increases by 1?

What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

£100.80 divided by 14 equals 7.2 how would we put this as money