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Y and x have a proportional relationship and y =5 when x = 4 what is the value of x when y =8

Y and x have a proportional relationship and y =5 when x = 4 what is the value of x when y =8
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1 vote
Y and x have a proportional relationship and y =5 when x = 4 what is the value of x when y =8

User Amrith
by
8.2k points

2 Answers

3 votes
y = kx
k = y / x = 5/4 = 1.25
so
y =8 then
8 = 1.25 x
x = 8/ 1.25 = 6.4

answer
x = 6.4 when y = 8
User Aneurinc
by
8.0k points
6 votes
y/x = 5/48/x = 5/45x = 32x = 6.4

Sorry if this doesnt help
User Twisted Whisper
by
8.4k points
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