Answer:
Directly proportional: as one amount increases another amount increases at the ... The "constant of proportionality" is the value that relates the two amounts ... Example: y is directly proportional to x, and when x=3 then y=15. ... Speed and travel time are Inversely Proportional because the faster we go the shorter the time.
Answer:
increasing; speeding up is my answer
Wave speed = (wavelength) x (frequency)
= (4 m) x (2 /sec)
= 8 m/sec