Function ans Graphs
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I can't figure out last part please:
A spring whose length is 7 cm stretches at 1/2 cm per 1 kg of suspended weight.
1) When 3 kg of weight is suspended, how many centimeters is the total length of the spring?
7 + 1/2 x 3 = 8 1/2 cm
2) Express relation between suspended weight x and total length y as an equation
y = 1/2 x + 7
3) When length is 9.2 how many kilograms does suspended weight wegh?
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