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The first on you just need to put it in y = mx + b form. They gave you the m. B is what y equals when x is zero, The coordinate has a x as zero, so b would 10. The equation would be y = -1/4(x) + 10.

Another way would be to substitute x, y, and m into y = mx + b and solve for b.



Im gonna have to look up point slope form to remember it better, but its going to be pretty much the same.

The equation is y = m(x - X) + Y, where X and Y are the point that you know. Its going to pretty much look like y = mx + b when you're done substituting.
 
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