Grade 6 Unlimited Math Practice: Constant Rate

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A factory makes desks at a constant rate. After 7 hours it made 3360 desks. Which table correctly shows the number of things made over the first 4 hours?

hours	desks
1	480
2	960
3	1440
4	1920

hours	desks
840	1
1680	2
2520	3
3360	4

hours	desks
1	480
2	960
3	1440
4	1920

hours	desks
480	1
960	2
1440	3
1920	4

Which function relates the number of cars produced, c, with the number of hours, h?

hours	cars produced
5	20
6	24
7	28
8	32

$h=4c$

$c=4h$

$h=24c$

$c=24h$

Which function relates the number of cars produced, c, with the number of hours, h?

hours	cars produced
5	40
6	48
7	56
8	64

$h=48c$

$c=48h$

$h=8c$

$c=8h$

Which function relates the number of books read, b, with the number of days, d?

days	books read
1	2
2	4
3	6
4	8

$b=4d$

$b=2d$

$d=4b$

$d=2b$

A bakery makes muffins at a constant rate. After 6 hours it made 840 muffins. Which table correctly shows the number of things made over the first 4 hours?

hours	muffins
1	140
2	280
3	420
4	560

hours	muffins
210	1
420	2
630	3
840	4

hours	muffins
1	140
2	280
3	420
4	560

hours	muffins
140	1
280	2
420	3
560	4