First person to comment will get brainliest yw

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance