Question

What is the equation of the line through (1,4) and (2,2)?
y= _x + __

Answer 1

y = -2x + 6

Explanation:

y = mx + c

m = (2-4)/(2-1) = -2/1

m = -2

y = -2x + c

When x = 1, y = 4

4 = -2(1) + c

c = 4 + 2 = 6

y = -2x + 6