Problema Solution
write the equation of the line in slope intercept form that contains the points (9,2) and (3,9)"
Answer provided by our tutors
the straight-line equations is the "slope-intercept" form:
y = mx + b
where "m" is the slope and "b" gives the y-intercept
m = (2 - 9)/(9 - 3)
m = -7/6
y = (-7/6)x + b
the line goes trough (9,2) thus for x = 9
y = 2
(-7/6)*9 + b = 2
by solving we find
b = 12.5
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the slope intercept equation of the line is
y = (-7/6)x + 12.5