Answer:
50-page photo album.....
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.....