What is the equation of the following graph?

The graph represents a vertical ellipse with centre (h,k)=(0,-2)

Length of major axis, 2a =6, that gives, a=3

And length of minor axis, 2b =2, that gives b=1 .

The equation of vertical ellipse is

Substituting the values of h,k,a and b, we will get

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.

b: y = 2x + 2

step-by-step explanation:

y = 2x + 1

we want a line that is parallel, so it will have the same slope

the line is in the form y= mx+b, so the slope is 2

we have a slope and the y intercept (0,2)

since x is 0 we know the y point which is the y intercept

we can use y= mx+b to write the equation of the line

m is the slope and b is the y intercept

y = 2x +2