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marialion5278
10.06.2020 •
Mathematics
If IK is 19 units long, JK is 9units long and IL is 26 units long, find the length of JL
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Ответ:
Step-by-step explanation:
Part AUse the data in the table to get the best fit line, with equation:
y = mx + bTo do so follow the steps:
1. Let the Height be x and the Weight be y
Sum x and y
∑x = 5.3 + 5.4 + 5.3 + 6 = 22∑y = 140 + 150 + 130 + 200 = 6202. Sum x² and xy
∑x² = 5.3² + 5.4² + 5.3² + 6² = 121.34∑xy = 5.3*140 + 5.4*150 + 5.3*130 + 6*200 = 34413. Calculate m, considering n = 4 (number of data values)
m = (n∑xy -∑x∑y)/(n∑x² - (∑x)²) = (4*3441 - 22*620)/(4*121.34 - 22²) = 124/1.36 = 91.17654. Calculate b:
b = (∑y - m∑x)/n =(620 - 91.1765*22)/4 = -1385.883 /4 =-346.4708We got the best line fit formula:
y = 91.1765x - 346.5708Part BFinding y for x = 4.5:
y = 91.1765*4.5 - 346.5708 = 63.72345 ≈ 64 lbs