Angela incorrectly claimed the equation 18-9x=2 represent the following description the difference of nine times a number 8 is too write the correct equation what error might angela has made

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.