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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