Which line shows linear relationships?

Solve ASAP for 20 points!

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)

Iwill give you ! what is the measure of ∠v ?

Two numbers have a sum of -19. one number is x. what expression represents the other number?