Find the equation for the horizontal line that goes through point m(a, b).

Horizontal means zero slope, or a zero coefficient on x.

y = b

Remark

The line is horizontal. That means that the equation is y = something. There is no x value for this. If it goes through M(a,b) then what you are concerned about is b

y = b is the equation of the line you seek.

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step-by-step explanation:

for this case we have that by definition, the volume of a cylinder is given by:

where:

r: it's the radio

h: it's the height

we have as data that:

substituting:

so, the cylinder volume is

option d