Which of the following equations are linear equations in two variables? (Select all that apply.)

Question

Which of the following equations are linear equations in two variables? (Select all that apply.)

x − 4y = 7

y = −x² + 2

y = −5x + 3

y² = x − 6

Answer 1

A linear equation is an equation between two variables that gives a straight line when plotted on a graph. In this case, linear equations use the variable x, rather than x², so that points (x,y) represent a straight line when graphed. Ex: y = 2x – 5

Answer:

x − 4y = 7

y = −5x + 3