i believe it would be 6m^2 because if she increased the size of all sides by .5 then that would make it 1.5 to each side and 1.5*4 because i assume the garden is a square then you would have 6m^2
So last year each of her side lengths were 1m. This year she wants to increase the 1m by 50%. To do that you convert 50% into a decimal which is 0.5. Then you find 50% of 1 and add the result to 1m.
