Question

Time (h), z
Distance from Home (mi), y
12
18
24
>>Substitute x = 2 and y 12 into the equation.
2
y = mx + b
5
y=2x+b
8
? = 2(? +b
rate of change: 2

Answer 1

Start with y = mx + b and m = 2:

1. y = 2x + b
2. Substitute x = 2 and y = 12: 12 = 2(2) + b
3. 12 = 4 + b → b = 8

So the equation is y = 2x + 8 (rate of change = 2).