Question 770585
QR would serve well as a base for the triangle.  Same x component, just difference in y is 11 units.  Sketch the graph on coordinate plane and see P is at x=1 while the base, QR is at x=5, so you can find the value of the altitude, {{{5-1=4}}}.  You now have enough to use area formula of {{{(1/2)(b)(h)}}}, where b is the base, h is the height.


Area is {{{highlight((1/2)*11*4)}}}