Will mark brainliest for best explained correct answer.

It goes down in fours, so you need to do it until you get to the 23rd number

Since this sequence goes down in 4s write out the four first numbers in the -4 time table
163 159 155 151

-4 -8 -12 -16. (-4n)

+167 +167. +167. +167. (You work out how much you have to add or take to get to the number above -4)

Therefore the linear nth term is -4n + 167

So if you want to find the 23rd term you do (-4*23) +167 =75

Hope this helps

The answer is that the rate of change is $50 per 1 monthhope this ; )