Question

If $x$ is directly proportionate $y$ and $x$=4.5 when y=3, find the following:

1. an equation connecting $x$ and $y$
2. the value of $x$ when $y$=6
3. the value of $y$ when $x$=12

Answer 1

Answer:

When a person uses a convex lens to read a dictionary, the dictionary must be placed at a distance 

Less than focal length

More than focal length

More than 2F

Between F and 2F