What is the opposite of 4.1

I really don't understand this concept can someone please help!

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.