If u varies directly with v and u=6 when v= -7, what is u when v=4. show steps. 

direct variation

u=kv

6=k(-7)

k=-6/7

u=kv

u =-6/7 * 4

u =-24/7

u = -24/7 or -3 3/7

Since u varies directly with v, then

u = kv ( k is the constant of variation )

to find k use u = 6 when v = - 7

k = = = -

thus u = - v

when v = 4, then

u = - × 4 = -

2 x 503

step-by-step explanation:

its 1006