8th grade math help? easy ten points

Here's the problem. It's from one of the earlier chapters and I can't remember how to do it and its going to be on the final. So your help would be GREATLY appreciated! It's a muliple choice question too, but I need to see how you got there so it doesn't look like I guessed. Thanks!

Write the equation of a line that passes through the point (-1,4) and has a slope of -1.

a. y=-x+4
b. y=-2x+1
c. y=-x+3
d. y=-2.5x+3

I know its either a or c because of the slope being -1. I just need to find how to get the other numbers in there! Thanks!

At x = -1, y = 4. Plugging these in for (a), 4 = 1 + 4 = 5 doesn't make sense. For (c), we get 4 = 1 + 3 = 4, so it must be (c).

Using the equation y=mx+c where c is the constant and m the slope

y=4, x= -1 and m= -1

4= -1(-1) + c
so c would be 3

Hence the answer to your problem would be c) y= -x + 3

Hope this helped!

The answer is C, im in grade 10 advance math so this is fairly easy for me, but if you dont believe me, you could put the lines on a graph.

so sub pionts into a or c until it equals
4=-(-1)+4
4=5 nope
so obviously c
4=-(-1)+3
4=4 yes
c

yes it has to be c because y=-1+3 because your y coefficient is 4 in your point and the 3 would be your y intercept as the equation is set forth

Actually it's A so your right.
4=-1+4 well thats to get you started.

Its a- because of the (...,4)