math
posted by Anonymous .
what is the equation of a line that passes through (1,4) and (2,7)?
a. y=x+5
b. y=x5
c. y=11x+8
d. y=11x5
plz help and exlain how to do it....thanks

(y+4)/(x1) = (7+4) / (21)
(y+4)/(x1) = 11
y + 4 = 11 x  11
y = 11 x  15
so I get none of he above unless d is a typo