Sx is the standard deviation of the x values and sy is the standard deviation of the y values. If you can use a calculator put the values in list one and list two then do 1 variable stats on list 1 then again on list 2
y = cos x
the graph has an amplitude of 1 and a period of 2π and crosses the y-axis at 1 for x = 0 and the x-axis at 0 for x = 
Answer:
Step-by-step explanation:
(2x-5)(x+2)
roots are 5/2 and -2
It is D. it has a negative slope and is not as steep as -3
Cross multiply your fractions. if you have x/3=5/7, x*7 has to equal 3*5, meaning 7x=15. divide both sides by seven to get x=7/15.