Homework Help: Algebra 1B

Posted by Liz on Thursday, August 2, 2012 at 3:57am.

Please help I am so confused...

Question:

supposed that y is directly proportional to x.

a) use the given info to find constant of proportionally k.

b) then use y=kx to find y for x=6

y= -62 when x=5

Please help.. thank you

this is all I have so far. not sure if I am correct.

y=kx

-62= k*(5)
but then how do I solve for k?

Algebra 1B - Damon, Thursday, August 2, 2012 at 4:11am
-62= k*(5)
divide both sides of your equation by 5
-62/5 = k
k = -12.4

now if x = 6
y = -12.4 * 6
y = -74.4
Algebra 1B - Liz, Friday, August 3, 2012 at 12:47am
Thank you so much! Now I undersand .. :)

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