Question

If the line + = 1 passes through the points (2, – 3) and (4, – 5) then (a, b) =

• A. (1, 1)
• B. (– 1, 1)
• C. (1, – 1)
• D. (–1, –1)

Answer 1

Answer: (D)

(–1, –1)

Answer 2

$\frac { \mathrm { x } } { \mathrm { a } } + \frac { \mathrm { y } } { \mathrm { b } }$ = 1

P (2, – 3) Ž $\frac { 2 } { \mathrm { a } }$ – = 1 ....(i)

Q (4, – 5) Ž – $\frac { 5 } { b }$ = 1 ….(ii)

Solve (i) & (ii)

a = – 1 , b = – 1