The equation of the line passing through (1,11) and (4,8) can be expressed in the form
x/a + y/b = 1.
Find a.
Find slope, m = 3/-3 = -1
y = -1 x + b plug in one point to calculate b = 12
y = -x + 12 re-arrange
x + y = 12 divide by 12
x/(12) + y/(12) = 1 a = b = 12
Find slope, m = 3/-3 = -1
y = -1 x + b plug in one point to calculate b = 12
y = -x + 12 re-arrange
x + y = 12 divide by 12
x/(12) + y/(12) = 1 a = b = 12