A food truck vendor averages 150 tacos sold when the price per taco is St. A study shows that the average number of tacos sold will increase by 25 tacos for every $1 that the price per taco is lowered. Which equation models the food truck's average sales in dollars, s, in terms of the price per taco, x?

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is