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Find x-intercept given y-intercept and slope
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Find slope given 2 points
Write equation given 2 points
Find y-intercept given slope and point
Find x-intercept given 2 points
Find x-intercept given y-intercept and slope
The slope of a line is
7
5
and the y-intercept is
70
. What is the x-intercept of the line?
Answer
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Hint
Can you answer 10 correctly?
Given a y-intercept of 70 and slope of
7
5
, the x-intercept is
?
The equation of a straight line in slope-intercept form is y = mx + b
b
is the y-intercept, which is where the line cross the y-axis (meaning x=0)
m
is the slope of the line, which tells you how steep the line is
For example, if the slope m=3 and the y-intercept b=-6
The equation of the line is y=3x-6
To find the y-intercept, set the y-value to 0, so 0=3x-6
Isolate the x, so 3x=6 or x=2