MATH 1112- Midterm Exam Guide - Comprehensive Notes for the exam ( 37 pages long!)
63 views37 pages
Document Summary
Testing solutions to an equation (given an x and y) using substitution. You will be given an ordered pair and an equation. After solving, the same number should be on both sides. For example, given the equation y=x^2, see if the point (3,9) is a solution. Insert 9 and 3 into the equation respectively. Given an equation, graph using x and y intercepts. First, find y intercept by plugging 0 in for x. This is where the function crosses the vertical y axis. Next, find the x intercept by plugging 0 in for y. Use a graphing calculator or plug random values into x to get y values. Plot the points and draw a line through them. *for this practice problem, 4 and -4 are good x values to use because they eliminate the. Insert given values into the equation to solve for the missing value. Given the equation 4x+5y=20, complete the ordered pairs below (0, ) ( , 0)