If y varies directly as x, find a linear function which relates them.
-$$y = 2 \text { when } x = \frac { 1 } { 9 }$$
A) $f ( x ) = \frac { x } { 18 }$
B) $f ( x ) = \frac { x } { 2 }$
C) $f ( x ) = 18 x$
D) $f ( x ) = x + \frac { 17 } { 9 }$

Question

Quizplus · Accepted Answer

If y varies directly as x, then y = kx for some constant k. Given y = 2 when x = 1/9, we can solve for k: 2 = k(1/9) => k = 18. Thus, the function is y = 18x.

If Y Varies Directly as X, Find a Linear Function y=2 when x=19y = 2 \text { when } x = \frac { 1 } { 9 }y=2 when x=91​

If Y Varies Directly as X, Find a Linear Function $y = 2 \text { when } x = \frac { 1 } { 9 }$