I need help with these 4. SO SORRY THAT THERE IS 4 :( im veryy stuck on these 4 i need a answer and i have to explain !! pls help

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?