SOLUTION: give the equation of this line in slope intercept form, the slope is -3, passes through (4,-1), y=3x+, i'm not sure what to do

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Question 1049530: give the equation of this line in slope intercept form, the slope is -3, passes through (4,-1), y=3x+, i'm not sure what to do
Found 2 solutions by Edwin McCravy, MathLover1:
Answer by Edwin McCravy(20063) About Me  (Show Source):
You can put this solution on YOUR website!

y = mx + b, where m is the slope -3 and b (unknown) is
the y-coordinate of the y-intercept.

y = -3x + b

It passes through (4,-1),

So the equation is true if we substitute x=4 and y=-1

-1 = -3(4) + b

-1 = -12 + b

11 = b

Now we substitute b = 11 in y = -3x + b

y = -3x + 11

That's the equation of the line

We get some points

x | y
0 |11
2 | 5
3 | 2
5 |-4



Edwin

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

the equation of this line in slope intercept form is y=mx%2Bb where m is a slope and b is y-intercept which i a point (0,b)
if the slope is -3,means m=-3
then we have y=-3x%2Bb
if the line passes through (x,y)=(4,-1), use it to find b
y=-3x%2Bb...........plug in 4 for x and -1 for y
-1=-3%2A4%2Bb
-1=-12%2Bb
12-1=b
b=11
and your equation is:y=-3x%2B11
check it on a graph: