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katen-ka-za [31]

3 years ago

8

Heyo! I need some help, please. What is the x coordinate if (x, 17) is on a line that passes through the points (1, 2) and (-1,

-8) on a standard (x, y) coordinate plane?

2 answers:

expeople1 [14]3 years ago

5 0

Answer:

x = 4

Step-by-step explanation:

<u>The line with points (1,2) and (-1,-8). Work out its equation.</u>

y = mx + b

<u>The slope is:</u>

m = (-8 - 2)/(-1 - 1) = -10/-2 = 5

<u>To find the y intercept, substitute x and y-xoordinates of point (1,2):</u>

2 = 5(1) + b
b = 2 - 5
b = -3

<u>The line is:</u>

y = 5x - 3

<u>Point (x, 17), substitute y-coordinate and solve for x</u>

17 = 5x - 3
5x = 17 + 3
5x = 20
x = 20/5
x = 4

Naya [18.7K]3 years ago

5 0

Answer:

X = 4

Step-by-step explanation:

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Answer:

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or

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Step-by-step explanation:

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we can use the formula to find the equation of the line:

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and we get:

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or

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