a) Graph and label as either direct (positive) or indirect (negative) the relationships you would expect to find between (see examples in appendix of chp. 1, textbook)

(i) the number of hot days per month and the sale of ice-cream,

(ii) the number of people get vaccinated and the number of people get seriously sick from Covid-19.

(iii) the popularity of a singer and the price of her concert tickets.