help:( help:( @Mathematics

Question

angela210793 · Answer

How?

anonymous · Answer

ya...ask...

anonymous · Answer

Show in two ways that the points (-6,5) , (1,-2)and (3,4) lie on a straight line..
what should I do?

anonymous · Answer

if you have  graphing calculator, it could be really, really easy.

anonymous · Answer

first method is by applying conjoincy...2nd is by graphical method...

anonymous · Answer

im done with the graphical method, how about the CONJOINCY?

anonymous · Answer

i wish i knew how to help you with conjoincy, but i cant. sorry

anonymous · Answer

thats ok

phi · Answer

You could use two of the points to find the equation of the line, and then show the third point satisfies the equation.
To find the equation, first find the slope: m= (y2-y1)/(x2-x1)   (difference in y values divided by difference in x values)
then solve for b (the y intercept)
y= mx + b,  substitute in a point (x1,y1) to get b= y1-mx1
your equation is then y=mx+b  (using the m and b you just found)
the third point should work:  y3= m x3  + b