In the Proportional relationship 'y = 15x', what is the CONSTANT of proportionality?

Most animals give birth during a general time of year. this is because animals naturally breed so that their young will be born at the time of year when there will be adequate food supply. the bar graph shows the number of live births of a jackrabbit native to california over the course of year x. based on the data, which of the following would be an appropriate conclusion? a) in general, rabbits give birth during the spring months b) in general, rabbits give birth during the summer months c) in general,m california jackrabbits give birth during the spring months d) in general, california jackrabbits give birth during the summer months

With number 11 ( show how you got the answer)

Acollection of nickels and quarters is worth $2.85. there are 3 more nickels than quarters.how many nickels and quarters are there?