J jaz New member Joined Jan 14, 2006 Messages 1 Jan 14, 2006 #1 how do find the y intercept in an equation like (3,2) and (5,8) i know how 2 find the slope but i forgot how 2 find the y intercept
how do find the y intercept in an equation like (3,2) and (5,8) i know how 2 find the slope but i forgot how 2 find the y intercept
U Unco Senior Member Joined Jul 21, 2005 Messages 1,134 Jan 14, 2006 #2 Use the straight-line equation y - y1 = m(x - x1). Substitute in the slope, m, and either of those two points into the equation. Rearrange to the form y = mx + c, where c gives you the y-ordinate of the y-intercept.
Use the straight-line equation y - y1 = m(x - x1). Substitute in the slope, m, and either of those two points into the equation. Rearrange to the form y = mx + c, where c gives you the y-ordinate of the y-intercept.
D Denis Senior Member Joined Feb 17, 2004 Messages 1,706 Jan 14, 2006 #3 jaz said: how do find the y intercept in an equation like (3,2) and (5,8) i know how 2 find the slope but i forgot how 2 find the y intercept Click to expand... Can you be more careful, jaz? (3,2) and (5,8) are coordinates of 2 points, NOT an equation: an equation has an equal sign. And "how 2 find" should be "how to find": numbers DO NOT replace words :evil:
jaz said: how do find the y intercept in an equation like (3,2) and (5,8) i know how 2 find the slope but i forgot how 2 find the y intercept Click to expand... Can you be more careful, jaz? (3,2) and (5,8) are coordinates of 2 points, NOT an equation: an equation has an equal sign. And "how 2 find" should be "how to find": numbers DO NOT replace words :evil:
