The graph of linear function f passes through the point (1,-9) and has a slope of -3 What is the zero of f?

-2

Step-by-step explanation:

Given parameters:

      Coordinates  = (1, -9)

  Slope  = -3

Unknown:

Zero of the f = ?

Solution:

The equation of the line is;

                     y  = mx + c

The zero of the equation is the value of the variable (x) when the independent variable is zero;

     y and x are the coordinates

         m is the slope

        c is the y-intercept;

since y = -9 and x = 1;

    - 9 = -3(1) + c

    - 9 = -3 + c

        c = -9 + 3  = -6

 Now, the equation of the line is;

                y  = -3x - 6

   the zero of the function, y = 0;

         0 = -3x - 6

         -3x = 6

           x  = -2

The zero of the function is  -2

b) well because you get well

answer: i'm not sure

step-by-step explanation: