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.
iliocostalis.
erectus spinae
The main group of muscles supporting the back are the erector spinae, comprised of the spinalis, longissimus,and iliocostalis.
Three major muscles in the back are the trapezius, latissimus dorsi, and the spinal erectae.
The prime mover for back extension is the Erector Spinae. It consists of three groups ( longissimus, iliocostalis, and spinalis)
Pectorals, biceps, masseter, quadriceps, adductor longus, erector spinae, iliocostalis, longissimus, spinalis, latissimus dorsi, transversospinales, rotatores, intertransversarii, pyramidalis, rectus abdominis, iliococcygeus, pubococcygeus, coccygeus and Levator ani.
The erector spinae muscles are responsible for extending the vertebral column. They run along the spine and help to maintain posture and assist in movements like bending backward or standing upright.
Longissimus Spinalis Semispinalis Iliocostalis, a minor role in extension but a major role in lateral bending and twisting of the spine Multifidius, a stabilizer muscle, plays a minor role in back extension
The erector spinae is a group of muscles that run along the spine and help with back extension and spinal stabilization. Erector spinae activity refers to the activation and engagement of these muscles during movements such as bending forward, standing upright, or maintaining posture. Strengthening the erector spinae can help improve spinal stability and reduce the risk of back injury.
Function
The parent function of the exponential function is ax
The IF function is the main function to do it and you can also use other logical functions, like the AND function, the OR function or the NOT function.