For the polynomial -2m^2n^3+7n^2-6m^4 to be binomial with a degree of 4 after it has been fully simplified, which must be the missing exponent on the m in the second term?

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 )