What is the slope of the line represented by the equation f(t)=2t−6? The slope is 2 and the y-intercept is −6. The slope is −6 and the y-intercept is 2. The slope is 2 and the y-intercept is 6.

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted