Work with equations of the form Ax + By = C, including finding intercepts and interpreting graphs of lines.
84 original linear equations in two variables questions in the SAT Ranker bank, with instant scoring and an Elo-based rank once you sign up. Below are a few free samples with full explanations.
A line is defined by the equation 8x + 20y = 80. What is the line's y-intercept (the y-value where x = 0)?
Setting x = 0: 20y = 80, so y = 4.
A line is defined by the equation 2x + 2y = 20. What is the line's x-intercept (the x-value where y = 0)?
Setting y = 0: 2x = 20, so x = 10.
A line is defined by the equation 7x + 6y = 42. What is the line's x-intercept (the x-value where y = 0)?
Setting y = 0: 7x = 42, so x = 6.
A line is defined by the equation 3x + 3y = 21. What is the line's y-intercept (the y-value where x = 0)?
Setting x = 0: 3y = 21, so y = 7.
A line is defined by the equation 8x + 16y = 64. What is the line's y-intercept (the y-value where x = 0)?
Setting x = 0: 16y = 64, so y = 4.