Practise the method.Example 1Enlarge P=(1,3) by scale factor 5 about (0,0). Find the image coordinates.Show worked answerAnswer: (5,15)Subtract the centre, multiply by 5, then add the centre: (0+5(1−0),0+5(3−(0))).Example 2Enlarge P=(1,3) by scale factor 5 about (1,−1). Find the image coordinates.Show worked answerAnswer: (1,19)Subtract the centre, multiply by 5, then add the centre: (1+5(1−1),−1+5(3−(−1))).Example 3A shape is enlarged by linear scale factor 2. By what factor does its area change?Show worked answerAnswer: 4Each of two dimensions is multiplied by 2, so area is multiplied by 22=4.