If a line t (f(x) = 2x +3) is perpendicular to a line n that passes through point (3,7), what is the equation of line n?

Firstly, we need to think of the equation of a line formula to figure out what information we have been given. y-y1 = m(x-x1) -> (x1, y1)This formula uses a point and a slope. We have been given a point on the line n already, (3, 7).We now must find the slope, m. The question says line t and n are perpendicular to each other, so the slopes must be negatively reciprocal (opposites). The slope of line t is:y = 2x+3 -> y = mx + cm = 2So the slope of n will be -1/2. Finally we fill this into the equation, so we get :y - 7 = -1/2(x - 3)2y + x = 10

NT

Related Maths GCSE answers

All answers ▸

Find x in: 2(x-2) = 3x+9


Solve these simultaneous equations 5x + y = 21, x- 3y = 9


How to solve the simultaneous equations of 3x + 2y = 9 and x-y = 3


If there are 20 marbles in a bag and 1/5 are red, what fraction are red if 1 more red marble is added?