How do I find the secant line through two points? Precalculus Limits, Motion, and the Tangent Line Definition of the Tangent Line 1 Answer Massimiliano Mar 2, 2015 Given two points: #A(x_A,y_A)# and #B(x_B,y_B)# the line that passes through them is: #(y-y_A)/(y_B-y_A)=(x-x_A)/(x_B-x_A)#. Answer link Related questions What is a tangent line? What are common mistakes students make with tangent lines? How do I find the tangent line of a function? How do I find the tangent line of #y=x^2# at its vertex? How do I draw tangent lines? What is the tangent line of a parabola at its vertex? How can I tell if a line is tangent to a circle? What is a secant line? What is the formula for the slope of a secant line? Question #9a3da See all questions in Definition of the Tangent Line Impact of this question 2780 views around the world You can reuse this answer Creative Commons License