Therefore, the algebraic form y + 3x = 2 of the linear function is fully determined

 The line represented by the graph of figure (a) of the questionnaire intersects the positive horizontal half-axis at the point with abscissa β = 2> 0, positive number and ordinate zero and the positive vertical half-axle at a point with abscissa zero and an ordinate positive number . Also the sign of the coefficient α is negative, α = -3 <0 (a expresses the slope and the position of the line). Therefore, the algebraic form y + 3x = 2 of the linear function is fully determined.