Three terms of an arithmetic sequence are shown below. which recursive formula defines the sequence?
f(1) = 6, f(4) = 12, f(7) = 18

a) f (n + 1) = f(n) + 6
b) f (n + 1) = 2f(n)
c) f (n + 1) = f(n) + 2
d) (n + 1) = 1.5f(n)

The equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true? a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of 5/9 degree celsius. a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit. a temperature increase of 5/9 degree fahrenheit is equivalent to a temperature increase of 1 degree celsius. a) i only b) ii only c) iii only d) i and ii only