Which of the following equations, represents the line with a slope of -2/5 and a y-intercept of 2? 1) y = -2/5x -2
2) y = -2/5x + 2
3) y = 2/5x - 2
4) y = 2/5x + 2 ​

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Find dy/dx using implicit differentiation ln(20+e^xy)=y

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x