Y varies directly as x.
If y=-4 when x=1/2. find y when x=2/3.

Question

Y varies directly as x.
If y=-4 when x=1/2. find y when x=2/3.

anonymous · Answer

The formula for direct relationships is y=kx.
so you have y as -4 and x as 0.5
substitute in the equation and solve to get k as -8. k is your constant in direct relationships.
so in your new equation, you now know that k is -8. so the new equation is y=-8x. substitute 2/3 for x and get y=-16/3

anonymous · Answer

addd the y and x that they gave u?

anonymous · Answer

first equation                            second equation                                   
y=-4 and x=1/2                      y=?   x=2/3             

-4+1/2=-3.5                          y+2/3=-3.5

                                                   y=-25/6