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Determine the intercepts of the line that correspond to the following table of values

Determine the intercepts of the line that correspond to the following table of values-example-1

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Answer:

x-intercept: (-21,0); y-intercept: (0, 14)

Explanation:

Let's first look at changes in x. x begins at -24 and increases by 9 to -15. At the same time, y begins at -2 and decreases to -8. Thus, the slope of the line in question is m = rise / run = -6/9 = -2/3.

Let's find the equation of the line in the simplest way: point-slope form.

y-(-2) = (-2/3)(x-[-24]). Then y+2 = (-2/3)x - (2/3)(24)), or

y + 2 = - (2/3)x + 16.

x-intercept: Let y = 0 and find x: 0 + 2 = -(2/3)x + 16, or 0 = -(2/3)x + 14.

Multiplying all terms by (-3/2), we get 0 = -x + 14(-3/2), or x = -21. Then the x-intercept is (-21, 0).

y-intercept: let x = 0 and find y: y + 2 = -(2/3)(0) + 16. Then y = 14. The y-intercept is (0, 14).


User Jamie Eltringham
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