Asked by Beth
Y is directly proportional to x
If y= 10 when x=-5 what is the value of y when x =30. The answer should be a number.
If y= 10 when x=-5 what is the value of y when x =30. The answer should be a number.
Answers
Answered by
Reiny
"Y is directly proportional to x" ---> y = kx, where k is a constant
you are given x=-5, y = 10
so
10 = k(-5)
k = -2
then y = -2x
so when x = 30
y = -2(30) = -60
you are given x=-5, y = 10
so
10 = k(-5)
k = -2
then y = -2x
so when x = 30
y = -2(30) = -60
Answered by
Marian
Thanks. i got -60 the first time, but when i was checking it I was getting -6 so I'll have to see what i was doing wrong! Thanks!!
Answered by
Anonymous
Y=30 when x=6 what is value of y when x=5
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