Answer:
10/13
Step-by-step explanation:
Y1-Y2 / X1-X2
18-8 / 18-5
18-8 = 10
18-5 = 13
1,000 = 10^3 (3 because there are 3 digits after the first one)
2,000 = 2 * 10^3
Answer
It takes two steps to solve this problem. Step 1, you must solve the binomial squared. Then combine similar terms.

now, you're asked to use it when ln(1.38), which is just another way of saying x = 1.38
so set x = 1.38 and see what "y" is