The graph shows the prices, in dollars, of different numbers of pies at Erik's store. The table shows the prices, in dollars, of different numbers of doughnuts at the same store. A graph shows Number of Pies on x-axis and Price of Pies on y-axis. The x-axis scale is shown from 0 to 12 at increments of 2, and the y-axis scale is shown from 0 to 160 at increments of 20. A straight line joins the ordered pairs 2, 20 and 4, 40 and 6, 60 and 8, 80 and 10, 100 and 12, 120. Doughnuts Number of Doughnuts Price of Doughnuts (dollars) 2 6 4 12 6 18 8 24 How many dollars more is the price of a pie than the price of a doughnut at Erik's store?

step-by-step explanation:

when the line is solid:

when the line is dashed:

this > inequality sign means:

this < inequality sign means:

this > inequality sign means:

this < inequality sign means:

about the problem:

srry i'm not done ! i'll

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺