Can someone please explain to me how to tell if a number it's prime or not

A prime number is a number where no other number other than 1 can be divided by it. for example, 11 is a prime number because you can only do 11/1. You can't divide any number from 11 except 1 so it is a prime number

Hope this helps!

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.