Just a couple of simple questions I'm having trouble on.
6. y is directly proportional to the square of x, and y = 48 when x = 4. What is y when x = 24?
10. y is inversely proportional to x, and y = 32 when x = 4. what is y when x = 18?
Thanks.
Just a couple of simple questions I'm having trouble on.
6. y is directly proportional to the square of x, and y = 48 when x = 4. What is y when x = 24?
10. y is inversely proportional to x, and y = 32 when x = 4. what is y when x = 18?
Thanks.
When something is directly proportional it means,
$\displaystyle y=kx$ where k is some constant.
Inversly proportional means,
$\displaystyle y=\frac{k}{x}$
so if y is directly proportional to the square of x then,
$\displaystyle y=kx^2$
Then use your values given to solve for K.
Hope that helps!