Which describes a correct way to construct a scatterplot?
When analyzing the number of home runs that a baseball player hit over several seasons, the season is the independent variable.
When analyzing the number of umbrellas that are sold during days with varying amounts of rain, the number of umbrellas that are sold is the independent variable.
When analyzing the number of registered voters by age, age is the dependent variable.
When analyzing the number of students that ride the school bus each day of the week, the day is the dependent variable.

It is A

Step-by-step explanation:

When analyzing the number of home runs that a baseball player hit over several seasons, the season is the independent variable.

Step-by-step explanation:

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.