Answer:
-222
Step-by-step explanation:
The new value of x is 74/84 of the old value, so the new value of y will also be 74/84 of the old value:
(74/84)·(-252) = -222
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If you like, you can solve for the constant of proportionality (k) in the equation ...
y = kx
-252 = k(84)
-252/84 = k = -3
Then you can use this equation to find the new value of y.
y = -3·74 = -222
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As we have seen above, there is no need to discover the value of k if there is only one new x-value to be concerned with. If you have to find y for a number of new x-values, then it can be useful to know what k is.