Pattern A and pattern B both start at 0. Whitch statement about the patterns is true? (Answers in picture.)

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).

On a architect's drawing of a house, 1 inche representa 1.5

When only separate discreet points are graphed it is called?