Question

Darren is finding the equation in the form y=mx+b for a trend line that passes through the points (2, 18) and (–3, 8). Which value should he use as b in his equation?

Answer 1

(2,18)(-3,8)
slope(m) = (8 - 18) / (-3 - 2) = -10 / -5 = 2

y = mx + b
slope(m) = 2
use either of ur points...(2,18)...x = 2 and y = 18
now we sub and find b, the y int
18 = 2(2) + b
18 = 4 + b
18 - 4 = b
14 = b <===ur y int

Answer 2

(2,18) (-3,8)
8 - 18 / -3 - 2
-10/ -5
2
y = 2x + b
8 = 2(-3) + b
8 = -6 + b
+ 6 +6
14 = b