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# What is the slope of the line that is perpendicular to y - 2x = 1?

### Question

What is the slope of the line that is perpendicular to y - 2x = 1?

A)
2
B)
-2
C)
1/2
D)
-1/2
E)
1

### Explanation:

The formula for perpendicularity is m=-¹/m
So, y-2x=1
y=2x + 1
y = mx +c
By comparison, m = 2
Recall , m=-¹/m
So m= -¹/2

## Discussion (8)

• The formula for perpendicularity is m=-¹/m
So, y-2x=1
y=2x + 1
y = mx +c
By comparison, m = 2
Recall , m=-¹/m
So m= -¹/2

• Toyyib

• Y-2x=1
4mula for gradient and intercep form is Y=mx+c
Rearrange, y=2x-1
:.m1=2
Remember for penperdicular line the formula is m1m2=-1 or m2=-1/m1

• Y-2x=1
Rearrange, y=2x-1
:.m1=2
Remember for penperdicular line the formula is m1m2=-1 or m2=-1/m1

• Dunmininu

Formula for slope of a line is y= mx + c. Where m is slope
Y= 2x + 1.
The equation of a perpendicular line must have a slope that is the negative reciprocal of the original slope.
Perpendicular slope = -1/2

• Chukwu Chibuzor

Equation of a straight line y=mx+c

Rearranging y-2x=1;
We have y=2x+1:
Comparing with equation of a straight line:
Slope=m=2