math
posted by rahul patel .
hooke's law determine that if a small weight is suspended from a spring,the length of the stretched spring y, is a linear function of the weight, x.
determine the linear equation if the unstretched spring is 12 inch and weight of 2 lbs stretches it to 16 inch

Looks like they provide data for two points. If it's a linear function, then those two points will provide the equation for the line.
Two points (0,12)(2,16)
Letting y be the length,
(y12)/(x0) = (1612)/(20)
(y12)/x = 4/2
y12 = 2x
y = 2x + 12