Find the equation for this graph. (1,10) (2,7) (3,4) (4,1) (5,-2)

On a piece of paper graph f(x)=5•(0.4)^x

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys