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Margarita [4]
3 years ago
7

Use the interactive to graph a line with the given points: (–1,7) and (1,–1) The coordinates of the y-intercept of the line are.

Mathematics
2 answers:
elena55 [62]3 years ago
7 0

Answer:

The y-intercept would be 6.25

Step-by-step explanation:

I found this by taking the two points and making it into a y = mx + b line.

WARRIOR [948]3 years ago
3 0

Answer:

(0,3)

Step-by-step explanation:

We can use the slope-intercept form to find the y-intercept.

First, we need to find the slope of the line.

We are given the points (-1,7) and (1,-1).

m=\frac{rise}{run}=\frac{-1-7}{1+1}=\frac{-8}{2}=-4

The slope is -4.

Slope-intercept is y=mx+b.

We can replace 'y' and 'x' with one of the points given, 'm' with the slope, and solve for 'b'. "B" would be the y-intercept.

I will use (-1,7):

7=-4(-1)+b\\\\7=4+b\\\\7-4=4-4+b\\\\\boxed{3=b}

The line's equation is y=-4x+3.

Therefore, the y-intercept is '3'. The coordinates of the y-intercept is (0,3).  

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