Question

Find the missing coordinate.
(-3,4) is a solution of y=4-3x

Answer 1

I don't understand your question of finding the missing coordinate. However, for a point like (-3,4) to be a solution of an equation it must make a true statement. For example:

if we have the equation y=3x, (1,3) is a solution to the equation because when
x=1, y=3 it makes a true statement for:
y=3x
3=3(1)
3=3 this is true.

But, (-3,4) is not a solution of y=4-3x because
when x=-3 and y=4 we have
y=4-3x
4=4-3(-3)
4=4+9
4=13 is a FALSE STATEMENT hope this helps

Answer 2

thank you so much it help a lot.