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The equation of line k is y=


10x–8. Perpendicular to line k is line , which passes through the point (2,2). What is the equation of line ?
Write the equation in slope-intercept form. Write the numbers in the equation as simplified proper fractions, improper fractions, or integers.
y=mx+b form

1 Answer

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Final answer:

To find the equation of the line perpendicular to y = -10x - 8 that passes through (2, 2), calculate the negative reciprocal of the original line's slope, which is 1/10, and use the point to find the y-intercept, which is 9/5. The final equation is y = 1/10x + 9/5.

Step-by-step explanation:

The equation of line k given is y = -10x - 8. A line that is perpendicular to line k will have a slope that is the negative reciprocal of the slope of line k. Since the slope of line k is -10, the slope of the perpendicular line will be 1/10 (because -10 * 1/10 = -1). Now that we know the slope of the perpendicular line, we can use the slope-intercept form y = mx + b and the point (2, 2) through which it passes to find the y-intercept.

To find the y-intercept, plug the slope (m = 1/10) and the point (2, 2) into the slope-intercept equation:

2 = (1/10)(2) + b

2 = 1/5 + b

b = 2 - 1/5

b = 10/5 - 1/5

b = 9/5

The equation of the perpendicular line is therefore y = 1/10x + 9/5.

User Nicolas Jafelle
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