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36 votes
36 votes
Please help explanation if possible

Please help explanation if possible-example-1
User Maszter
by
2.8k points

2 Answers

16 votes
16 votes

Answer:

y = -2x + 8

Explanation:

for me the easiest way is simply to transform the slope and then just determine the y-intersect.

the slope of the original line is 1/2.

it is always the factor of x and represents the y/x ratio of the function (how many units is y changing when x changes a certain number of units).

a perpendicular line (90 degree angle) simply reverses x and y and the sign of the original slope.

so, the slope of the perpendicular line is -2, and the equation is

y = -2x + c

and c we get by using the point coordinates :

2 = -2×3 + c

2 = -6 + c

c = 8

so, we have

y = -2x + 8

User DiffracteD
by
2.8k points
21 votes
21 votes

Answer:

y= -2x +8

Explanation:

perpendicular lines have a negative reciprocal gradient so

1/2 becomes -2/1 which is the gradient

sub in the values of x and y

2= -2 (3) +C

2= -6 + C

8=C

y=-2x +8

User Igor Okorokov
by
2.8k points