For the function $y = 6 - 5 x$ , the value of $y$ , when $x = 1$ can be given by .

f (1)

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f (- 1)

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5

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- 1

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Solution

The correct option is A $f (1)$

$f (x) = 6 - 5 x$ is another way to express the function $y = 6 - 5 x$ .

The value of $y$ when $x = 1, y = 6 - 5 \times 1$ .....(A)
and $f (1) = 6 - 5 \times 1$ .....(B)

from (A) & (B) above, the value of $y$ , when $x = 1$ is equal to $f (1)$ .

$∴$ The value of $y$ , when $x = 1$ can be given by $f (1)$

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