Question

16. (02.06 MC)

The double number line below shows the approximate number of pounds in a certain number of kilograms:
1
2
3
Kilograms
3
5
7
Pounds
Based on the number line, about how many pounds are there in 4.5 kllograms? (1 point)
8
10
O 11

Answer 1

10

Explanation:

First find the slope. putting pounds over kilograms

m = ( y2-y1)/(x2 -x1)

m = (7-5)/(3-2)

= 2/1

Using the slope intercept form of a line

y = mx+b

y = 2x+b where y is the pounds and x is the kilograms

Substitute a point into the equation to get b

3 = 2(1) +b

3 =2+b

1 =b

y = 2x+1

We want to know how many pounds for 4.5 kilos

y = 2*4.5 +1

y = 9+1

y = 10