Find the sum of the first n terms.
100+50+25+ (8 terms)
(round to nearest hundredth)

formula: a-a*r^n/1-r

Mr. jones determined that the equation y = 98 - 16/5 x could be used to predict his students' unit test scores, based on the number of days, x, a student was absent during the unit. what was the meaning of the y-intercept of the function? (by the way the 16/5 is a )