Solving for y: Day 2 Insights

What is the standard form of a linear equation?

• ax + by = c

• y = mx + b

• ax^2 + bx + c = 0

• y = ax^2 + bx + c

In the first problem, what does 'X' represent?

• Price of chips

• Number of bags of chips

• Total cost

• Number of sodas

What is the first step in converting a standard form equation to slope-intercept form?

• Multiply both sides by the coefficient of y

• Subtract the x-term from both sides

• Add the x-term to both sides

• Divide both sides by the coefficient of x

What is the slope of the equation y = 3.10 - 0.70x?

• 3.10

• 0.70

• 15.50

• -0.70

What does the y-intercept represent in the equation y = 3.10 - 0.70x?

• The point where the line crosses the y-axis

• The point where the line crosses the x-axis

• The slope of the line

• The total cost

In the second problem, what does 'Y' represent?

• Number of pants

• Price of pants

• Number of shirts

• Total cost

What is the slope-intercept form of the equation 7x + 10y = 70?

• y = 7 - 7/10x

• y = 70 - 7x

• y = 7x + 10

• y = 10x - 7

What is the slope of the equation y = 7 - 7/10x?

• 7/10

• 7

• 70

• -7/10

What is the y-intercept of the equation y = 7 - 7/10x?

• 7

• 7/10

• -7/10

• 70

What should you do if you notice an error when entering an equation in standard form into Desmos?

• Change the coefficients

• Convert the equation to slope-intercept form

• Check for typos

• Re-enter the equation