Which type of triangles is similar?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median amount spent? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

State one method by which you can recognize a perfect square trinomial.