Question

A line passes through the points (1, 0.98) and (0.8, 1.18). Find the point where it intersects the y-axis

Answer 1

write the equation of line passing through two points 

(y-0.98) = $\frac{1.18-0.98}{0.8-1}$ (x-1)
y-0.98 = $\frac{0.2}{-0.2}$ (x-1)
y-0.98= -1 (x-1)
y-0.98 = -x+1
x+y-1.98=0 is the required equation-------(1)

the line intersects y axis at (0,y)
substitute in eqn(1)
0+y-1.98=0
y=1.98
there fore the required point is (0,1.98)