MA129 Lecture 5: Linear Functions
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Note: an ordered pair is a coordinate (x,y) Note: m is the slope of the line m < 0 since the line is the line is increasing m > 0. If m2 > m1 > 0 then the m2 line is steeper than the m1 line. Point slope form of a line y y0 = m x0. This will give you a point y , Eg. ( 0 x0 y 2 = 5 + 3 ( 3 2 (x is the point on the line and the line has a slope of 5. (dr. allison) Slope intercept form y = m + b. X x y = 3 + 2. 0, ) ( 2 is on this line (dr. allison) Find the equation of the line that passes through the point. 4 and is (dr. allison) and the slope is. 3 2 = 4 x x y y. Next, line is passing through y ( 4 = 4.
