Question

Question?

18. If y varies directly as x, and y = 15 as x = -3, find y for the x-value of 6.

A. -30
B. -32
C. -34
D. -36

Answer 1

x=ky
y=25, k = 2/5
x=2/5 * 25
x= 10

Answer 2

sorry but i dont understand the question

Answer 3

oh its directly so its y= kx

Answer 4

15=-3k
k=-5

y=-5x
can you finish?

Answer 5

forget about the 45

y varies directly so its Y=K*X

Answer 6

\[y = k*x\]
\[y = 15\]
\[x = -3\]
\[15 = -3*k\]
solve for k

Answer 7

wrong, why do you multiply?

Answer 8

i will do it step by step

\[y=k*x\]
divide by x
\[\frac{y}{x}=k\]
\[\frac{15}{-3}=k\]
\[-5=k\]

plug it in
\[y=-5*x\]
\[y=-5*6\]
\[y=-30\]
thats why you should do the problems yourself and not trust every answer

Answer 9

understood?

Answer 10

correct