Q6. Slope

Question

What is the y-intercept of the line that passes through the points (1,1) and (5, 13)?

a) -2

b) -1

c) 1

d) 2

Explanation

Slope is the change in Y values / change in X values.

Slope = (13-1) / (5-1) = 3

Now use slope-intercept form and plug in one of the points to figure out the equation. Let’s use (1,1).

y = mx + b

1 = 3(1) + b

b = -2

y = 3x - 2

Now that we know the equation, we need to figure out the y-intercept. The y-intercept is the point where x = 0.

y = 3(0) - 2

y = -2

(A) is the correct answer.

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