Question

1. Suppose y varies directly with x, and y=14 when x=-4. what is the value of y when x=-6?
a.-21
b.10
c.18
d.21

Answer 1

varies directly means it is directly proportional
\[\large y~ \alpha ~x\]

Answer 2

so, y is any constant times x

y = k*x

use the given point x= y= they gave to figure the k value

Answer 3

thank you

Answer 4

then with that k you can use

y=k*x, to get y when x is anything, here they want y when x=-6

Answer 5

if y varies directly with x, then
\[\frac{ y }{ x }=constant\]

Answer 6

this means any pair of y and x gives the same value of constant...
from the given pair of y and x you can find the constant and then use y = constant * x to find the missing value of y