Jody gets paid $200.00 per week, plus $10.00 for every oil change she completes. Write the equation that shows the relationship between the of oil changes and her weekly income. Then write the slope of the line that represents the relationship.

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).