Question

If a line intersects the y-axis at (0,-1) and has another point

at (3,1), what is the equation of the line?

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y = x - 1

y = x + 3

y = 3x

y = x + 1

Answer 1

Slope = (1 - (-1)) / (3 - 0) = 2/3. With y-intercept -1 the line is

y = (2/3)x - 1.

None of the four given choices match this equation (y = x - 1 has the right intercept but wrong slope).