Question

Find the value of b if the point (2, 9) lies on the graph of the equation by = ax + 2. Given a = 8.

• A. 2

Answer 1

The correct option is A 2
If the point lies on the graph then it satisfies the given equation,
Putting x = 2, y = 9 in the given equation,
$b\times 9=a\times 2+2$
$\Rightarrow 9b=2a+2\because a=8$
$\Rightarrow 9b=2\times 8+2$
$\Rightarrow b=18÷9$
$\therefore b=2$