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f ( x ) = 6 * ( 1 / 2 )^x; Option C

Step-by-step explanation:

We can tell that this exponential model, modeled by 4 possible exponential function, could be only one of either types exponential growth, or exponential decay. As the graph decrease it should model exponential decay, in the form;

f ( x ) = a * ( b )^x, where a ⇒ start value, b ⇒ constant, and x ⇒ varies depending on situation,

Now if a ⇒ start value, we can tell that the y - intercept is ( 0, 6 ), which would mean that the equation so far is ⇒ f ( x ) = 6 * ( b )^x . b acts as a constant, a number with which two points known on the plot differ by the multiplication of it . We know for certain that the points ( 0, 6 ) and ( 1, 3 ) are points on the graph, and 6 and 3 differ by the multiplication of 2 . Thus we have before us the equation f ( x ) = 6 * ( 1 / 2 )^x;

Answer; f ( x ) = 6 * ( 1 / 2 )^x; Option C

add -60 to 120 which will result in : 2x+3y=180

then subtract 2x: 3y=-2x+180

lastly, divide by 2: y= -2/3x+60

hope this is the answer you're looking for: )