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Which equation represents the line through (0,0) and (3,4)? a. y=3/4x b.y=4/3x c.y=4x d.y=3x

Sagot :

Answer:

b

Step-by-step explanation:

The equation of a line passing through the origin is

y = mx ( m is the slope )

Calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (0, 0 ) and (x₂, y₂ ) = (3, 4 )

m = [tex]\frac{4-0}{3-0}[/tex] = [tex]\frac{4}{3}[/tex]

y = [tex]\frac{4}{3}[/tex] x → b

The equation of the line though (0, 0) and (3, 4) is [tex]y=\frac{4}{3}x[/tex]

The correct answer is an option (b)

What is the formula for the equation of line passing through two points?

"If the line is passing through points [tex](x_1,y_1),(x_2,y_2)[/tex] then the formula to find the equation of line is [tex]\frac{y-y_1}{y_2-y_1}= \frac{x-x_1}{x_2-x_1}[/tex]"

For given question,

The line passes though points (0, 0) and (3, 4)

Let [tex](x_1,y_1)=(0,0),(x_2,y_2)=(3,4)[/tex]

Using two-point form of line,

[tex]\Rightarrow \frac{y-y_1}{y_2-y_1}= \frac{x-x_1}{x_2-x_1} \\\\\Rightarrow \frac{y-0}{4-0}= \frac{x-0}{3-0}\\\\ \Rightarrow \frac{y}{4} =\frac{x}{3}\\\\ \Rightarrow y=\frac{4}{3} x[/tex]

Therefore, the equation of the line though (0, 0) and (3, 4) is [tex]y=\frac{4}{3}x[/tex]

The correct answer is an option (b)

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