Would each situation be represented by a positive or a negative number? column a column b 1. 1.5 acres of rainforest are destroyed every second for s seconds. express the change in acreage of rainforest. 2. a tub of water is heated by 0.3 degrees per minute for m minutes. express the change in temperature. 3. a submarine descends at a rate of 0.9 m/s for 90 s. express the change in altitude relative to sea level. 4. a credit card account has 2 charges of $15 and no payments. express the balance of the credit card. a. positive b. negative

1. being destroyed would be a negative number

2. water increasing in temperature is a positive number

3.descending would be a negative number

4. credit card charge would be a positive number

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold