rewrite the following compound statement as a biconditional.
if it rains, then i use an umbrella, and if i use an umbrella, then it is raining.
a. if i use an umbrella, then it is raining.
b. if my umbrella is broken, then it is not raining.
c. i use an umbrella, if it rains.
d. i use an umbrella if and only if it rains.

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

Identify the conclusion of the conditional statement. if you live in phoenix, then you live in arizona.

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis