write the equation of a line with the given information: (4,8) and (16,32)

Question

shadowfiend · Answer

Do you know how to calculate the slope from that info?

anonymous · Answer

use the slope formula  m=y2-y1
                                      ---------    < divided by
                                          x2-x1
(4,8) (16,38)
x1,y1 x2, y2

plug them in to find your slope.
m=38-8
     -----    < divided by     m=3.75 or 15/4
      16-8
so now you use y=mx+b - y=yalue, m=slope, x=x value & b=y-intercept
one of your y values is 8 [you can use 38 if you want]
8=3.75(4)+b
8=15+b
b=-7

your final formula is     y=15/4x-7