3. daniel stands on a bridge over a river. he drops a coin and notes that the coin takes 3 s to reach the river below.
he must be standing
above the river.
a 10 m
b. 15 m
c. 30 m
d. 45 m

Iknow the first part it is the average star i am not 100% sure

If one were to put the y value into the equation, they could find out what x is for a certain value of y.  putting in the value of y (1), we get the equation: 1=4x-12=4xx=0.5this means that the value of x when why is 1 is x=0.5