Simplify using positive exponents

How many grams are in 8 kilograms? if 100 grams = 1 kilogram

Can someone me and do the problem plz so i can understand it more better

4. (10.03 mc) the equation of line cd is y = −2x − 2. write an equation of a line parallel to line cd in slope-intercept form that contains point (4, 5). (4 points) y = −2x + 13 y = negative 1 over 2 x + 7 y = negative 1 over 2 x + 3 − 2x − 3