Answer:
Scale factor = 3
Explanation:
Where we dilate a figure by a scale factor of k, the coordinates of all the vertex are transformed using the rule:
(x, y) = (k*x, k*y)
So, in order to identify the scale factor, we need to identify the coordinates of points P, Q, and R and points P', Q', and R'. Then:
P(1, 3) ------> P'(3, 9)
Q(3, 1) ------> Q'(9, 3)
R(1, 1) -------> R'(3, 3)
Therefore, the scale factor is 3, because:
P(1, 3) ------>(3*1, 3*3) = P'(3, 9)
Q(3, 1) ------>(3*3, 3*1) = Q'(9, 3)
R(1, 1) ------->(3*1, 3*1) = R'(3, 3)
