1)
Entrees:
y1=f(x1)
y2=f(x2)
debut
a = (y2 - y1)/(x2 - x1)
b = y1 - a*x1
fin
2) a.
x1 = -2 ; x2 = 6
y1 = 1 ; y2 = 5
a = (5-1)/(6-(-2)) = 4/8 = 1/2
b = 1 - 1/2 * (-2) = 2
b.
x1 = -2 ; x2 = 2
y1 = 2 ; y2 = 5
a = (5-2)/(2-(-2)) = 3/4
b = 2 - 3/4 * (-2) = 7/2
