How to write the point slope form of an equation of a line?

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

I’m really confused and need your assist me with this question i’ve never been taught

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?