Choose the equation of the line passing through the point (-1, 7)and perpendicular to y = -1/4x - 5

y = -4x - 3
y = -4x - 11
y = 4x + 3
y = 4x + 11

Question

Choose the equation of the line passing through the point (-1, 7)and perpendicular to y = -1/4x - 5


		y = -4x - 3
		y = -4x - 11
		y = 4x + 3
		y = 4x + 11

campbell_st · Answer

the perpendicular line has an gradient of m = 4      this is the negative reciprocal of the given line. 

then the equation is in the form y = 4x + b

substitute x = -1 and y = 7 to find the value of b, the y- intercept.

anonymous · Answer

|dw:1340656948806:dw||dw:1340657042264:dw|