College Readiness M... Overview Plans Resources Follow-up and reports Partici Equation 1: f(x) = x2 + 2x - 3 Equation 2: f(x) = -x2 + 2x + 3 Equation 4: f(x) = -x2 + 2x - 3 Equation 3: f(x) = x2 + 2x + 3 Using the above set of equations, answer the following question: What is different between equations 1 and 3? Your The graph of equation 1 is narrower than the graph of equation 3. The "a" value is greater in equation 3 than in equation 1. The graph of equation 3 is 6 units above the graph of equation 1 as the y-intercepts are 6 units apart. The y-intercept of equation 1 is at (0,3); the y-intercept of equation 3 is at (0, -3). The "c" value is +3 in equation 1 and -3 in equation 3 The graph of equation 3 is 6 units above the graph of equation 1 as the y-intercepts are 6 units apart. The y-intercept of equation 1 is at (0,-3); the y-intercept of equation 3 is at (0,3). The "C" value is -3 in equation 1 and +3 in equation 3. The graph of equation 3 is concave up, the graph of equation 4 is concave down. Equation 3 has a y-intercept at -3 while equation 4 has a y-intercept at 3. The "a" value is positive in equation 3 and negative in equation 4. The "c" value is -3 in equation 3 and +3 in equation 4.​