What’s is the formula for the fill arithmetic sequence? -9,-2,5,12

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Find the zeros of each function. f(x) = x^2 + 5x - 6