You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going to buy some calves to add to the Bar-S herd. How much should a healthy calf weigh? Let x be the age of the calf (in weeks), and let y be the weight of the calf (in kilograms). x 3 3 9 16 26 36 y 47 51 77 100 150 200 Complete parts (a) through (e), given Σx = 93, Σy = 625, Σx2 = 2327, Σy2 = 83,239, Σxy = 13,687, and r ≈ 0.998. (c) Find x, and y. Then find the equation of the least-squares line = a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) x =? y =? = ?+ ?x
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going to buy some calves to add to the Bar-S herd. How much should a healthy calf weigh? Let x be the age of the calf (in weeks), and let y be the weight of the calf (in kilograms).
| x | 3 | 3 | 9 | 16 | 26 | 36 |
| y | 47 | 51 | 77 | 100 | 150 | 200 |
Complete parts (a) through (e), given Σx = 93, Σy = 625, Σx2 = 2327, Σy2 = 83,239, Σxy = 13,687, and r ≈ 0.998.
(c) Find x, and y. Then find the equation of the least-squares line = a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.)
| x | =? | |
| y | =? | |
| = | ?+ ?x |
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