how do you find the equation of a line perpendicular to another line at a point?
The gradient of the perpendicular line is the negative reciprocal of the gradient of the original line. For example if the gradient of the original line is 4, the gradient of the perpendicular line is -1/4. If the gradient of the original line is 1/2 , the gradient of the perpendicular line is -2 (=-2/1). The equation of the perpendicular line can then be found by substituting the gradient (m) and the given point (x,y) into the equation y=mx+c.(the reciprocal of a number is 1/that number)
FG
Related Maths GCSE answers
All answers ▸How can I find the stationary points of a parabola given it's equation?
Factorise 7x^2+4x-3
A stationary ball starts rolling down a hill, and after 5s it reaches a speed of 12m/s. From here the ground levels off, and the ball continues at this speed for 3 more seconds. Plot this on a velocity-time diagram.
Ms Henderson has two jars of sweets. The jars contain the same number of sweets in total. 25% of the sweets in Jar A are mint. Two fifths of the sweets in Jar B are mint. There are 10 mint sweets in Jar A, how many mint sweets are there in Jar B?