Which point on the number line represents 30%?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Consider the function f(x)=-5x+3 what is f(-2)

Louis wants to carpet the rectangular floor of his basement. the basement has an area of 864 square feet. the width of the basement is 2/3 it's length. what is the length of louis's basement