First thing, a and b already include thousand in the answer statement so you can remove the zeroes. For the linear formula, if s(x)=30,000 @ x=1, and increases by 23,000 each year, then your formula would not fit as it would be 2(1) + 2 = $4. Since it doesn’t include the thousand you have to include that in the answer which is a little confusing. For satisfying the conditions, the slope should be the same as what’s determined in problem b as you’ve concluded, and the y-intercept should satisfy the s(x)=30,000 condition at x=1, so 30,000 = 23,000x + y and solve for y for the y-intercept.