Simplify the expression
on image below, if not loading here it is in print

x^9/5 times x^2/5 divided by x^1/5

the / means fraction format
the ^ means to the power of/ above of

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 )