Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range
A formula or graph are two ways to describe a math function. How a math function is described depends on the domain of the function or the complexity of the function.
The Mandelbrot graph is generated iteratively and so is a function of a function of a function ... and in that sense it is a composite function.
reentering a room
J
BY exiting the water and reentering the water.
By reentering the Earth's atmosphere.
the chalenger
check valve
Yes
Proper insulation and pressurization, thermal panels if reentering, engines
Aerodynamic stability orientation and thrust control, Guidance and navigation
You must always enter the US with a passport, or a valid immigration card.
States reentering the Union tended to favor the Democratic Party.
No. Sputnik 1 burned up on 4 January 1958, as it fell from orbit upon reentering Earth's atmosphere