Acommuter has $245 in his savings account. this account changes by -$15 each week when he buys a ticket. in one time period, the account changed by $240. for how many weeks did the commuter buy tickets? how much must he add to his account if he wants to have 20 weeks worth of tickets in his account?

hi,

3. 12.15, you are correct.

4.2.01, your first digit is correct,

hope this !

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