Need to know how to graph this example y= -2x + 25. i know that y=mx+b. just confused on how to get what they call plug in. can someone explain . example how do i know x= 0 and x= 1

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.