Find the equation of the line that contains the point (-1, 2) and is perpendicular to the line 2x + 4y = -2
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slope of the required st. line = -1/(-1/2) = 2
Do you know the relationship between a line and it perpendicular with regard to slope?
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There slope will be negative reciprocal. As shown by CoCoTsoi the slope of the line 2x+4y=-2
y=(-2/4)-1/2 The coefficient of x is the slope is -2/4 or -1/2 so the negative reciprocal is 2 This is shown in the first line of the solution in the first post above.
ok thank you
It is an important relationship. The reciprocal of a number is a 1 divided by that number like the reciprocal of 3 is 1/3 of course a negative reciprocal of 3 is -1/3 the negative reciprocal of -3/5 would be 5/3 etc.