y=x/7
y=(1/7) x
It is a direct variation since it is of the form y=kx, where k=1/7 , a constant
3/7 is equal to 21/49
xy = K so K = 21
20/21
If P varies directly with q, r and s then P = kqrs, where k is a constant. As 70 = k x 7 x 5 x 4 = 140k : k = 70/140 = 1/2 The equation of joint variation is P = ½qrs.
d = -196
Inverse: as x increases so y diminishes and vice-versa.
4x= y
9 over 7
The answer is 9,800. 9,800 over 7= 1,400
7 over 8
-7
It is: 1127/7 = 161
6/7 = .86
14*7 = 98
28/4 = 7.
No, 4/5 equals 0.8 while 7/10 equals 0.7
e = 12/7