Question

if y = -252 when x = 84, what is y when x = 74

Answer 1

if x =1  y = ?

y = -252/84
y = -3
y = -3*74
y = - 222

we need to calculate the value of y when x =1
we have to divide the value of y by value of x by doing this we can get the value of y is -3 when x=1
when x = 74 we have to multiply the value of x & y (74 *-3)
so the answer is -222

Answer 2

Answer:  The required value of y is -222.

Step-by-step explanation:  We are given that y = -252 when x = 84.

We are to find the value of y when x = 74.

Since y and x are directly related, so we have

$y\propto x\\\\\Rightarrow y=kx,~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{where k is the constant of proportionaliy}]$

When y = -252 and x = 84, we get

$-252=84k\\\\\Rightarrow k=-\dfrac{252}{84}\\\\\Rightarrow k=-3.$

So,

$y=-3x.$

Now, when x = 74, then the value of y is given by

$y=-3\times74=-222.$

Thus, the required value of y is -222.