How do you find the slope of a line that passes through two points

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 drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

With number 11 ( show how you got the answer)