The following graph shows a proportional relationship. What is the constant of proportionality between y and 2 in the graph?
Y
8
6
4
2
2
2
4
6
Help fast pls

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?