Find the slope of the line between (1,5) and (3,9)

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

m=(9-5)/(3-1)

m=4/2

m=2

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.

b