Miles Driven, Gallons of
Gasoline in
Tank, y
15
14.6
0
10
20
35
14.2
13.6
12.6
60
75
12
When these data are graphed on a
coordinate grid, the points all lie on the
same line. What are the slope and y-
intercept of this line?
slope = -25, y-intercept =
15
slope = 25, y-intercept =
375
slope =
= 375
1
, y-intercept
25
9
1
slope
y-
25
intercept = 15

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

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)