A piano teacher tracks the number of audience members for a recital to plan the best size auditorium to reserve for future recitals. The model ŷ = 4.1x + 8.6 explains the relationship between x, the number of students performing, and ŷ, the predicted number of audience members. Identify and interpret the slope.
a) 8.6; for each additional student performing, there are 8.6 more audience members.
b) 4.1; for each additional student performing, there are 4.1 more audience members.
c) 8.6; for each additional audience member, there are 8.6 more students performing.
d) 4.1; for each additional audience member, there are 4.1 more students performing.