Answer :
The equation bx + ay = ab expressed in intercept form is shown as;
[tex]\begin{gathered} \frac{x}{a}+\frac{y}{b}=1 \\ \text{When x=0,} \\ b(0)+ay=ab \\ ay=ab \\ y=\frac{ab}{a} \\ y=b \\ \text{When y=0} \\ bx+a(0)=ab \\ bx=ab \\ x=\frac{ab}{b} \\ x=a \\ \text{Therefore, the x-intercept is a, and the y intercept is b} \\ \text{The equation in intercept form is now;} \\ \frac{x}{a}+\frac{y}{b}=1 \end{gathered}[/tex]Note that the x and y intercepts have been indicated in the course of solving the question.