The ordered pairs (20, 29.5), (21, 31), and (22, 32.5) are points on the graph of a linear equation.
Which of the following graphs show all of the ordered pairs in the solution set of this linear equation?
Find the slope of the line going through two of the points and then match that slope with one of the graphs.
y2  y1  = slope of a line x2  x1 (21, 31) , (22, 32.5) {two points} 32.5  (31)  = slope {substituted into the slope formula} 22  21 1.5  = slope {simplified} 1 3  = slope {changed to a fraction} 2 Remember slope is rise over run. Looking for the line with a vertical change of 3 and a horizontal change of 2. In other words, find the line that goes down 3 for every 2 it goes to the right. A.) Ask Algebra House
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