y is the total amount/pounds of almonds that Lark bought. x is the amount that Tessa bought. 3/5 is the same as 0.6. If we multiplied Tessa's amount by 0.6 it would decrease by 2/5 so we have to add 1 to make it 1.6. To find how much Lark bought multiply 1.6 and Tessa's amount.
So the question is to estimate the value of g(1.95) and g(2.05). So by calculating i came up with a values of both the given and here are the following: G(1.95) = -3.8 while the G(2.05) is 4.2. I hope you are satisfied with my answer