Can someone plz do this 4 me... will give brainliest

What is the slope of the equation y =

How do i i solve this equation? -18 = x/3 + 3

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!