Line EF has an equation of a line y = −2x + 7. Which of the following could be an equation for a line that is perpendicular to line EF?

y = 2x − 3
y = 1 over 2x − 3
y = −2x − 3
y = −1 over 2x − 3

Question

Line EF has an equation of a line y = −2x + 7. Which of the following could be an equation for a line that is perpendicular to line EF?

 y = 2x − 3
 y = 1 over 2x − 3
 y = −2x − 3
 y = −1 over 2x − 3

mehek14 · Answer

slope should be negative reciprocal

elise_a18 · Answer

it's either B or D

mehek14 · Answer

so negative of -2 = -(-2) = 2
reciprocal
1/2

elise_a18 · Answer

I don't understand where they get the 3 from

mehek14 · Answer

3 is the y-intercept

triciaal · Answer

if line AB is perpendicular to line CD then the slope of AB* slope of CD = -1

triciaal · Answer

slope of given line  is -2