Plotting Points from a Table

Pre-Algebra · Axiom Academy

EXAMPLE Plotting Points from a Table Build a table of values from the equation y = x + 3 , then plot the points and see the shape they form. For the equation y = x + 3 , find the y -value at each x in , then plot the (x, y) points on a coordinate plane and describe the shape they make. Nice work! You turned an equation into a table, then turned the table into a graph. Here's what made it click: Equation → table: substitute each x into y = x + 3 to get its matching y . Each pair is a point: are points on the plane. Constant rate of change: y goes up by 1 for every 1 that x goes up. Linear means a line: a constant rate of change makes the points fall on a straight line. Equation, table, graph — three views of the same relationship. Every linear equation graphs as a straight line.

This is the written version of the interactive lesson above. See the full Pre-Algebra course.