**Helpful Links****Question**

19) The point

The point

A line perpendicular to

Find an expression for

*P*has coordinates (3, 4)The point

*Q*has coordinates (*a*,*b*)A line perpendicular to

*PQ*is given by the equation 3*x*+ 2*y*= 7Find an expression for

*b*in terms of*a*.**[5 marks]**