4 years old is the answer i think
Answer:
x = 81
Steps:
It says that y ~ √x
We have points (9, 18) as a guide.
We can write y = f(x) = a√x +b
Use points (9, 18) as a guide
18 = a√9 +b
18 = 3a + b
One solution might be a = 6, which means f(x) = 6√x
Thus when y = 54,
54 = 6√x
9 = √x
81 = x
the equation would be y = 30 + x and if your brother will read for 15 minutes then you'll read for 45 minutes i believe.
Answer:
It mean that the x is now replace with -2 in the whole equation
Step-by-step explanation:
