M60 Day 15 4.3 Graphing in Slope-Intercept Form. Calculating Slope Formula…

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M60 Day Graphing in Slope-Intercept Form

Calculating Slope Formula…

Slope

Examples Find the slope of the line determined by the pair of points.

Graphing Methods 1.Complete a T-Table 2.Intercepts using Standard Form: 3.Slope-Intercept

Slope-Intercept Form Equation must be solved for the variable “y” m= the coefficient of the “x” term is the slope. b= the y-intercept (thus the name of the form) b is written as an ordered pair (0,b) – The sign of b is included in the y-intercept

Slope-Intercept Form Given (0,3); …find the equation of the line passing through the point and having the given slope. Given (0,-6);

Determine slope and y-intercept Given:

Slope-Intercept Graphing Method Form: Write the equation in slope-intercept form. Label the slope and the y-intercept, and then use them to draw the graph.

Graph using Slope-Intercept

Lesson 4.4a Finding the Equation

Find an equation… Find an equation in slope-intercept form for the line passing through the two given points. 1.Determine the slope. 2.Rearrange the slope of a line formula. 3.Use Point-slope Form and one point (only). 4.Solve for y to put into slope-intercept form.

Cost Profit=Actual Selling Price – Cost During the month of January, a department store would like to have a sale of 40% off of women’s tall boots. The store purchased the boots for $33 per pair. How much should the selling price be, if the manager of the store wants to make a 10% profit per pair.

Traveling After traveling for 40 minutes, Mr. Koole had to slow to 2/3 his original speed for the rest of the trip due to heavy traffic. The total trip of 84 miles took 2 hours. Find his original speed.

Coming up… Day 16 Reading Guide 4.4a Quiz #6 Due November 22 nd Quiz #7 Due November 27 th Thanksgiving Holiday November – No School. No SMART Lab

Exit Ticket 1.Find the slope of the line determined by the pair of points. 2.Write the equation in slope-intercept form. Label the slope and the y-intercept written as an ordered pair. Then graph the equation.