Question

 what’s the y intercept and slope of all of them? I give Brainly

Answer 1

9514 1404 393

Answer:

1. slope: 6; y-intercept: -3
2. slope: 11; y-intercept: -1
3. slope: 2; y-intercept: -13
4. slope: 1; y-intercept: -6

Step-by-step explanation:

The slope is found using the slope formula. It works well to choose ordered pairs that only differ by 1 in their x-value.

  m = (y2 -y1)/(x2 -x1)

The y-intercept is the y-value when x=0. If it is not in the table, it can be found from one point and the slope.

  b = y1 -m·x1

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1) slope = (9 -3)/(2 -1) = 6

  y-intercept = -9 -6(-1) = -3

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2) slope = (21 -(-1))/(2 -0) = 22/2 = 11

  y-intercept = -1 . . . from table for x=0

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3) slope = (-9-(-11))/(2-1) = 2

  y-intercept = -11 -(2)(1) = -13

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4) slope = (-4 -(-5))/(2 -1) = 1

  y-intercept = -7 -1(-1) = -6