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What is the equation of this

line?
A. y = 4/3x - 4
B. y = 3/4x - 4
C. y = -4x + 4/3
D. y = 4x + 3/4

What is the equation of this line? A. y = 4/3x - 4 B. y = 3/4x - 4 C. y = -4x + 4/3 D-example-1

1 Answer

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Answer:

A. y = 4/3x - 4

Explanation:

Equation of line is given as y = mx + c, where m is the gradient/slope and c is the y-intercept.

Since line passes through y-axis at -4, equation of line is y = mx - 4.

So C and D are out.

Now we have to find the gradient of the line.

Formula for finding gradient is given as y2-y1 ÷ x2-x1, where x and y are the coordinates of the points.

From the graph, we can use the coordinates where the line passes through each axis. The coordinates are (3,0) and (0,-4).

Gradient = (-4-0) ÷ (0-3) = 4/3

Hence equation of line is y = 4/3x - 4.

User Alex Shroyer
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