What is the slope of a line that passes through points (-5, 8) and (-5, -3)?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Suppose that g(x)=f(x+9) which statement best compares the graph of g(x) with the graph of f(x)

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!