Question

If (4, 19) is a solution of the equation $y=ax+3$, then a =

• A. 3
• B. 4
• C. 5
• D. 6

Answer 1

The correct option is B

4

$\because (4,19)$ is a solution of the equation $y=ax+3$,

$\therefore x=4,y=19$ will satisfy the equation.

$\therefore 19=a\times 4+3=4a+3$

$\Rightarrow 4a=19-3=16\Rightarrow a=\frac{16}{4}=4$

$\therefore a=4$