Any thing done

**before** the "main function" changes x (and so affects the graph horizontally), anything done

**after** the "main function" changes y (and so affects the graph vertically).

Here your "main function" is given as

.

multiplies by 5

**after** doing

and so affects the graph vertically.

The x-intercepts are where the graph "intercepts" the x-axis and so y= 0.

is the same as

or

. The x-intercepts are at x=

and

. Some people refer to the "x-intercepts" as just the x value (

and

) and some as the

**points** (

and

. Check with your teacher or textbook to see which convention is used in your class.

The y-intercepts are where the graph "intercepts" the y-axis and so x= 0. Just put x= 0 into

to get y= -1. Again, the y-intercept is either the value y= -1 or the point (0, -1) depending on the convention used.

I have no idea what "math pure 30" is but (liberal arts) colleges want you to be educated in a broad range of subjects. You will very likely be required to take at least one mathematics course in college.