What is the constant of proportionality between y(2) and x(3) in the graph?

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)

Does the point (1, sqrt 7) lie on circle shown.

Multiplying fractions by whole number 5 x 1/3=?