What is the average rate of change for this quadratic function for the interval from x = 2 to x = 4?

S-7< 3 i need answering this problem someone asap answer

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Graph the equationy= x+3[tex]y = x + 3[/tex]