Question

the slope of the line passing through the points A (1,-1) and B (4,5) is ​

Answer 1

Answer:

Step-by-step explanation:

f(x)=ax+b

f(1)=-1

f(4)=5

a+b=-1

4a+b=5

-4a-4b=4

-3b=9

b=-3

a=2

f(x)=2x-3