Okay, So in this problem, it says, use the formula from problems 57 through 60 in order to solve it. And it gave us a table of values. Um, so we're using the formula N B plus Sigma X, which is the sum of the X values times, eh? He was of some of the Y values. Our second equation is that some of the exercise again times be plus the sum of the expert a square times, eh equals the sum of the product of the X and Y values. So I needed those all of those coefficients. So in in this case is for, uh, some of our X values. It's seven. There's some of our wives I use is 174. The sum of our ex square that is 13.5, and the some of the products excellent wine by is is 322. The next slide. I will set up those equations and go ahead and solve it. So we're gonna have four b plus seven a pickling 1 74 We're gonna have seven b was 13.5. Okay. Equaling 3 22 Okay, so to get my coefficients to line up a multiplying my first equation by seven. And my second equation before I give us 28 b is our coefficient for both equations. It's gonna change everything else, though. So for our first equation, able come out to the 49 or the coefficient will be 49 and 1 74 times seven is 12 18 second equation member 28 be So those will cancel four times 13.5 is gonna be 54 a and then four times 3 22 is 12 88. It's almost subtract my top equation from my bottom equation. That's gonna leave us with five a equaling 70 tried about five a Is 14 going back over here to plug in to the first equation I have for being seven times 14 is equaling 1 74 seven Fun times 14 98. So I'm just gonna go ahead and try it 98 from both sides. And so we have four being Is he going to 76 and dividing before I guess it's B because 19. Okay, so our final equation our line of best fit he's gonna be 14 x close 19 said it must know what would happen if we had 160 acres. So X was in terms of hundreds of acres. So it's asking. What it's asking me to do is plug in 1.6. So we're gonna have the amount of fertilizer needed for 160 acres. Would be why is 14 times 1.6 plus 19? Okay. And that's just gonna equal 41.4, Which makes sense because it fit pretty well on that chart. Okay, so thank you very much.