Indicate the answer choice that best completes the statement or answers the question. Determine whether each linear function is a direct variation. If so, state the constant of variation.

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

In a column proof the right column states your reasons