Help! Have a math test tomorrow and I'm. Not sure on this

d = days passed

y = pages read

Andrew right now is on page 50, so we can say that his equation looks like => y = 50.  He's planning to read 10 pages per day, so, let's make a quick table for that

dayspages

150 + 10(1)

250 + 10(2)

350 + 10(3)

450 + 10(4)

550 + 10(5)

d  50 + 10(d )

namely y = 50 + 10d.

Holly hasn't started to read yet, so her equation looks like => y = 0,  but she'll be reading faster than Andrew, she'll be doing 20 pages a day, let's make another table

dayspages

10+20(1)

20+20(2)

30+20(3)

40+20(4)

50+20(5)

d  0+20(d )

or just pretty much y = 20d.

bearing in mind that, on a system of equations, the solution is where the graphs meet, or intersect, check the picture below.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,