The equation below describes a proportional relationship between x and y. What is the constant of proportionality?

Ared balloon starts at 7.3 meters off the ground and rises at 2.6 meters per second. a blue balloon starts at 12.4 meters off the ground and rises at 1.5 meters per second. when will the balloons be at the same height?

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For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)