y varies directly wth x; y = 400 when x = 1000?

2 ⤊

Find the constant of variation K.
y varies directly wth x; y = 400 when x = 1000

2007-07-01 12:59:20 · 5 answers · asked by associates07 1 in Science & Mathematics ➔ Earth Sciences & Geology

y varies directly with x
===> y = kx

substitute the values of y & x,
400 = k*1000
k = 400/1000 = 0.4

2007-07-01 13:14:40 · answer #1 · answered by jurassicko 4 · 0⤊ 0⤋

The equation for direct variation is k = y/x

so K = 400/1000 or, simplifying, it is 2/5 or 0.4.

2007-07-01 13:04:47 · answer #2 · answered by Vangorn2000 6 · 0⤊ 0⤋

y=Kx
400 =K(1000)
K = .4

2007-07-01 13:03:44 · answer #3 · answered by ironduke8159 7 · 1⤊ 0⤋

If Kay is 0.4, who's her X?

2007-07-02 12:08:14 · answer #4 · answered by Gazza Bear 2 · 0⤊ 0⤋

um
the answer is
koolaid

2007-07-01 13:02:33 · answer #5 · answered by Batman 3 · 1⤊ 2⤋