# SOLUTION: find the equation of a line that passes through 4,8 and -3-6 my problem is when she asked questions like this one how do you now which formula to use thank you

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 Click here to see ALL problems on Equations Question 258403: find the equation of a line that passes through 4,8 and -3-6 my problem is when she asked questions like this one how do you now which formula to use thank youAnswer by CharlesG2(828)   (Show Source): You can put this solution on YOUR website!find the equation of a line that passes through 4,8 and -3-6 my problem is when she asked questions like this one how do you now which formula to use thank you the equation of a line is y=mx+b, where m is the slope, and b is the y-intercept (sometimes called the verical intercept), b is the point (0,b) m=(y2-y1)/(x2-x1) or the rise/run am hoping -3-6 means (-3,-6) y=((-6-8)/(-3-4))x+b y=(-14/-7)x+b y=2x+b 2=(y2-y1)/(x2-x1)=(8-y1)/(4-0) (solving for y1 which will be b) 2=(8-y1)/4 ; 2=(-6-y1)/(-3-0) 8=8-y1 ; 2=(-6-y1)/-3 0=-y1 ; -6=-6-y1 0=y1 ; 0=-y1-->0=y1 -----> b is 0 y=2x