(a) Justification:

The relationship of a dependent variable with two independent cariables maybe of various types. When this relationship is linear in nature, the graph of this equation is nothing bu a plane in a three-dimensional space.

Thus, the graph of a linear equation with two independent variables is a plane.

(b) Justification:

The relationship of a dependent variable with two independent cariables maybe of various types. When this relationship is linear in nature, the graph of this equation is a hyperplane in the (k+1) - dimensional space.

Thus, the graph of a linear euation with k>2 independent variables is a hyperplane

The relationship of a dependent variable with two independent cariables maybe of various types. When this relationship is linear in nature, the graph of this equation is nothing bu a plane in a three-dimensional space.

Thus, the graph of a linear equation with two independent variables is a plane.

(b) Justification:

The relationship of a dependent variable with two independent cariables maybe of various types. When this relationship is linear in nature, the graph of this equation is a hyperplane in the (k+1) - dimensional space.

Thus, the graph of a linear euation with k>2 independent variables is a hyperplane