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VARVARA [1.3K]
3 years ago
15

What is the y intercept of a graph containing the two points (3,1) and (7,-2)?

Mathematics
1 answer:
svetlana [45]3 years ago
6 0

Answer:

  3.25

Step-by-step explanation:

The slope of the line is ∆y/∆x = (-2-1)/(7-3) = -3/4.

The point-slope form of the line with slope m through (h, k) is ...

  y -k = m(x -h) . . . . . . . . . . we have m=-3/4, (h, k) = (3, 1)

  y -1 = -3/4(x -3)

The y-intercept is the point on the line where x=0. For x=0, the value of y is ...

  y = -3/4(-3) +1 = 9/4 +4/4

  y = 13/4 = 3 1/4

The y-intercept is 3 1/4.

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