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SLOPE. The ratio of the vertical change to the horizontal change. IN LAYMAN’S TERMS:. Slope is the measure of the steepness of a line!. HOW IT’S FIGURED: there are two ways. Also know as: Rise Run. VERTICAL CHANGE. ___________________. STEEPNESS =. HORIZONTAL CHANGE. **OR**.
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SLOPE The ratio of the vertical change to the horizontal change
IN LAYMAN’S TERMS: Slope is the measure of the steepness of a line!
HOW IT’S FIGURED:there are two ways Also know as: Rise Run VERTICAL CHANGE ___________________ STEEPNESS = HORIZONTAL CHANGE **OR** Change in Y-axis ___________________ SLOPE (m) = Change in X-axis
And the answer is…. 3 2.5
And the answer is… 4 or 2 2 1
And the answer is…. 7 - 2.5
And the answer is…. 5 - 4
Solve by graphing: • A line goes through points (-3,5) and (2,1)
To solve by graphing: • Start at the left dot and count down till you’re even with the right dot.
To solve by graphing: • Start at the left dot and count down till you’re even with the right dot.
To solve by graphing: • Now count over till you reach the right dot.
And the answer is…. 4 down, 4 to the right -4 5
To solve by formula, simply replace the x and y values with the x and y values of the points. (-3,5) and (2,1) y1 – y2 x1-x2 Hint! (-3[x1], 5[y1]) and (2 [x2], 1 [y2]
And the answer is… 5 – 1 4 -3 – 2 -5 There the same answer!
WORK TIME!In your groups Find the slope of a line that contains points A(-2, 5) B(4, -5)
HERE’S HOW YOU SOLVE IT: Change in Y-axis ___________________ SLOPE (m) = Change in X-axis 5 – (-5) ___________________ m of line AB = -2 - 4 10 ___________________ = -6 5 ___________ - = 3
NOW TRY THESE ON YOUR OWN Find the slope of a line that contains each pair of points: • R(9, -2) S(3, -5) • M(7, -4) N(9, 4)
True or False?? ALL HORIZONTAL LINES HAVE THE SAME SLOPE
TRUE! All horizontal have a slope of 0
CAN TWO LINES HAVE THE SAME SLOPE?
YES! Parallel lines have the same slope
It’s a Miracle! Slope Intercept Form y= mx + b X- x value Y- y value M- the slope B- y intercept ( we will learn about this tomorrow)
Slope Intercept Form In the equation: Y= 2x + 5 2 is the slope What is the slope of the line of: Y= 2/3x + 8?
Classifying Slope • Positive slope – line slants up from • left to right. • • Negative slope – line slants down • from left to right. • • Zero slope – line is horizontal. • • Undefined slope – line is vertical.
Try with your group: X Y • What is the slope of the line representedby the table of values below?
Try with your group: Which of the following shows the graph of a line with positive slope? B A D C
Which statement best describes the slope of the line graphed above? Try with your group:
Which of the following lines appears to have the greatest slope? Which of the following lines appears to have the greatest slope?