Question

y ∝ √ x If y = 42 when x = 9 find, y when x = 100

Answer 1

Step-by-step explanation:

x=100

y=?

$\frac{ \sqrt{x} }{ {y} } = \frac{ \sqrt{9} }{ {42} } \\ \frac{ \sqrt{100} }{y} = \frac{3}{42} \\ \frac{10}{y} = \frac{1}{14} \\ y = 14 \times 10 = 140$