Question

The points (3, 24) and (7, 56) represent points of a function where y, the number of photographs, varies directly with x, the number of pages in an album. Which statement describes another point on the graph of this function?

Answer 1

y varies directly with x implies the equation y = kx, where k is basically the slope.
Finding the slope (which is 8 because 3(8) = 24 and 7(8) = 56) using the slope formula:
$k = \frac{56-24}{7-3} = \frac{32}{4} =8$

So any point that satisfies y = 8x will be another point on this graph.

Answer 2

I still don't really understand your question.