Answer:
A graph shows direct variation if it goes throught the origin. The equation is y=kx, where I is a constant, which is apparent when we write the equation as yx=k. In slope intercept form, the equation form, the equation would be y=mx+b, where m=k, and b=0
Answer: knowledge of when and where earthquakes have occurred in the past
Explanation:
knowledge of present tectonic setting, historical records, and geological records are studied to determine locations and recurrence intervals of earthquakes. Thus, Earthquakes are measured using instruments called seismometers, that detect the vibrations caused by seismic waves as they travel through the crust.
One such area is the circum-Pacific Ring of Fire , where the Pacific Plate meets many surrounding tectonic plates. The Ring of Fire is the most seismically and volcanically active zone in the world.
