Which of the following types of information is best suited for display on a double line graph?
a) average wages paid to men and women over 5 years
b) average heights of basketball players in five schools
c) average ages of people entering the public library in five locations
d) average prices of two car models at five dealerships.

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.