Question

number of beads
80
72
64
56
48
40
32
24
16
8
2 4 6 8 10 12 14 16 18 20 22 24 26
cord length (in.)
y = 2.52x + 1.61
angelique has a cord that is 32 inches long. based on the information above, which is the best estimate for the number of beads she can use?
12
68
82
132

Explanation:

Step1: Substitute x=32 into equation

$y = 2.52(32) + 1.61$

Step2: Calculate 2.52×32

$2.52 \times 32 = 80.64$

Step3: Add 1.61 to the result

$y = 80.64 + 1.61 = 82.25$

Step4: Round to nearest whole number

$y \approx 82$

Answer:

82 (Option C: 82)