Answer:
The equation for the variation is:

Step-by-step explanation:
The relationship is given by the quotient between the two variables: (1) distance of the storm, and (2) the number of seconds to hear the thunder. That is:

An easy way to tell whether a graph is a function or not is to employ the verical line test. If you see any two y values that correspond to one x value, that means it is not a graph of a function, but rather a relation. In a we see that if we were to scan a vertical line from the left to right, there would be a point where an x value corresponds to two y values, which is at 2 to the left from the origin. In graph c you can find an x value that correspons to more than one y value at the origin, the same with graph b. With graph d, though, we see that all x values corresponds to only one y value so that graph is the one that is a function.
<span>the odds are 3 to 1 against you flipping 2 tails in a row.</span>
2/3 + w = 1 1/2
get a common denominator, 6
2/3 * 2/2 = 4/6
1/2 * 3/3 = 3/6
4/6 + w = 1 3/6
subtract 4/6 from each side
w = 1 3/6 - 4/6
change the 1 to a common denominator of 6
w = 6/6+ 3/6 - 4/6
W = 9/6 - 4/6
w = 5/6
Answer w = 5/6