△ABC has vertices A(1,1) B(5,5) and C(4,6) What is the perimeter of △ABC

What is the area of △ABC? Show your work.

Length in units:

Use phytogoras theorem or measure it by a ruler if your using a graph paper

AB = 5.65 units

AC = 5.83 units

CB = 1.41 units

Perimeter =5.65 + 5.83 + 1.41 = 12.89 units

Area = 1/2 * 1.41 * 5.65 = 3.98units

a. the residual plot for model 1 has a random pattern and is a good fit for the data.