Can someone please help me

50-page photo album

Step-by-step explanation:

to get the slope of the function you divide the y-values of the coordinates by the X-values of the coordinates:

(56+24)/(7+3) = 80/10=8

we can make now a function

y = aX + b

a= the slope, so a= 8. we get:

y = 8X + b

for b we fill in one of the two coordinates (I choose (3,24))

24 = 8 • 3 + b

24 = 24 + b

b = 0

the function is:

y =8X

now we fill in for y 400, 560, 8000, or 8400 and check if the x coordinate is right or not.

400 = 8X X = 50

560 = 8X X = 70

8000 = 8X X = 1000

8400 = 8X X = 1050

the only answer that is right is 50-page photo album