Distance formula derived from Pythagorean theorem

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is

If point cis between points a and b, then ac + — = ab