Y is directly proportional to x 2 . If y = 8 when x = 2 find y when x = 5

y=20 when x=5

Step-by-step explanation:

you can find the value of y when x is 1

(it'll be 4)

then you can multiply 4 by 5 which is 20

y = 50

Step-by-step explanation:

Given y is directly proportional to x² then the equation relating them is

y = kx² ← k is the constant of proportion

To find k use the condition y = 8 when x = 2 , then

8 = k × 2² = 4k ( divide both sides by 4 (

2 = k

y = 2x² ← equation of proportion

When x = 5 , then

y = 2 × 5² = 2 × 25 = 50

.mp4 files, because, video

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?