A certain cosine function has an amplitude of 5. Which function rule could model this situation? a) f(x)=5cos(x)+3f(x)=5cos(x)+3

b) f(x)=3cos(x)+5f(x)=3cos(x)+5

c) f(x)=cos(5x)+3f(x)=cos(5x)+3

d) f(x)=cos(3x)+5

The answer should be D

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for

Aand b are correctly balanced reactions. they have the same number of atoms in both sides of the reaction