If y varies directly as x, find a linear function which relates them.
-$y = 0.6$ when $x = 1.2$
A) $f ( x ) = 0.6 x$
B) $f ( x ) = 0.5 x$
C) $f ( x ) = x - 0.6$
D) $f ( x ) = 2 x$

Question

Quizplus · Accepted Answer

Since y varies directly as x, the relationship is $y = kx$. Given $y = 0.6$ when $x = 1.2$, solve for k: $0.6 = k \times 1.2$, so $k = 0.5$. Thus, the function is $f(x) = 0.5x$.

If Y Varies Directly as X, Find a Linear Function y=0.6y = 0.6y=0.6

If Y Varies Directly as X, Find a Linear Function $y = 0.6$