Write an equation of the line in point-slope form that passes through the given points. (-1,-1) and (-7,-2)

What is the common difference in the following arithmetic sequence 7,3,-1,-5

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)

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.