Which of the following random variables is geometric? The number of digits in a randomly selected row until a 7 is found. The number of 7s in a row of 50 random digits. The number of tails when a coin is tossed 50 times. The number of diamond cards obtained in a seven-card deal-out of a shuffled deck of 52 cards. The number of 2s when rolling a die 5 times.

The number of digits in a randomly selected row until a 7 is found.

Step-by-step explanation:

A geometric distribution models the number of trials needed to obtain the first success.

The first option counts the number of digits until a 7 is found.  Therefore, it is geometric.

the graph is negative for all real values of x where   -6 < x < -2.

step-by-step explanation:

this refers to the values of f(x) in the area below the x-axis.