Determine whether each of the following situations describes a positive association, a negative association, or no association.

a)adolescents who spend more time on sedentary activities tend to have larger waistlines than those who spend less time on sedentary activities.

b)in patients undergoing hemodialysis, leptin levels are unrelated to the length of time the patients have undergone dialysis.

c)a 1 degree c increase in average temperature between february and april leads apple and cherry trees in germany to blossom nearly five days earlier.

d)among different genotypes of wheat, shorter plant heights are associated with lower grain yields.

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.

c

c

c

c

c

c

c

cc

c

step-by-step explanation:

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.