If $c$ and $d$ are positive constants, which equation could define $f…

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Text

The graph of

y = f (x) - 19

is shown. [cite: 2371, 2377]

c

and

d

are positive constants, which equation could define

f

f (x) = d - c x

f (x) = - d + c x

f (x) = d + c x

f (x) = d + x / c