Graphs have a vertical line (y-axis) & a horizontal line (x-axis) MBM 3C Slope Review Graphs have a vertical line (y-axis) & a horizontal line (x-axis) To plot points on the line each point must have an x-coordinate & a y- coordinate (x,y) To Plot the point (5,-2) on the grid find 5 on the horizontal (x-axis) and rise up -2 on the vertical (y-axis) To Plot the point (3,6) on the grid find 3 on the horizontal (x-axis) and rise up 6 on the vertical (y-axis) Join the points with a ruler to make a line. Does this line have a positive or negative slope?)  

The steeper the line, the larger the number for the slope. SLOPE (symbol “m”) Slope describes the steepness of a line. Think of the slope of a ski hill, a roof or a mountain road. The steeper the line, the larger the number for the slope. The formula for slope: A B rise run A(x1,y1) B(x2,y2) Find the slope between: A (3.4) and B(5,8)

From text p96 # 3:. The cost of topsoil is $40 for delivery and From text p96 # 3: The cost of topsoil is $40 for delivery and $18 per cubic yard of soil. Let C represent the cost & let v represent the volume of soil. Table of values: Graph: V (cubic yards) C ($) 1 2 3 4 5 Cost C ($) Equation: C=__________________ Volume V (cubic yards)

What is the initial cost if topsoil? ________   What part of the graph does this represent? The _________ intercept. What is the rate of increase of the top soil? _____________ What part of the graph does this represent? The _________.