H e l p !!

is this table a linear function?

To show that polygon abcde is congruent to polygon fghij, a must be used to make the two polygons coincide. a sequence of two transformations that can be used to show that polygon abcde is congruent to polygon fghij is .

Answer question above and explain each step : )

Find the vertex of the function given below y=x^2-6x+1