Which best describes the strength of the model with an r-value of –0.93?

a weak positive correlation
a strong positive correlation
a weak negative correlation
a strong negative correlation

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.