Witch best describes the function in the table from x =5 to x =9

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

Which graph represents the equation y =4x

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min. if they did not stop driving, how many miles could kyle and elijah drove in a whole day? ? 1 day = 24 hours. plzzz write a proportion i will give you 100 points