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y = 100 - 4x ( a ) Find the value of y when x = 20.
It depends on what y is.
Y for Yes
Oh, what a lovely question! When x is 3, we simply substitute x with 3 in the equation to find the value of y. It's like adding a happy little tree to your painting - just plug in 3 for x and see what beautiful value of y comes out!
y-axis