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?
-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
Thank you so much! Now I undersand .. :)
Y=74.4
To solve for the constant of proportionality, k, you can use the given information: "y is directly proportional to x." This means that the ratio of y to x should always be the same.
Let's use the equation you've written: -62 = k*(5)
To solve for k, divide both sides of the equation by 5:
(-62)/5 = k*(5)/5
-12.4 = k
So, the constant of proportionality, k, is equal to -12.4.
Now that we have found k, we can use the equation y = kx to find the value of y when x = 6.
Substituting the values into the equation, we have:
y = (-12.4)*(6)
y = -74.4
Therefore, when x = 6, y is equal to -74.4.