Calculate how much time they spent on each topic if their presentation lasted 20 minutes (The first topic has been done for you). Show your work.

please someone answer cuz this is for my test​

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.

i belive those are the ones that are under 90 degreese.

it would open into a square depending on the type of envelope i’m not sure about the second part