A student says that the slope of the line for the equation y=20-15x is 20 and the y-intercept is 15. Find and correct the error.
The general form of a linear equation would be y = mx + b, where m is the slope and b is the y-intercept.
So, the slope is -15 and the y-intercept is 20
Rewrite the equation
y = -15x + 20
The slope is -15, and the y intercept is 20
The slope is the coefficient of x. Where is the x? What is its coefficient?
The y-intercept is the constant term, the one with no x. Where is that term? What is its value?
Comments
The general form of a linear equation would be y = mx + b, where m is the slope and b is the y-intercept.
So, the slope is -15 and the y-intercept is 20
Rewrite the equation
y = -15x + 20
The slope is -15, and the y intercept is 20
The slope is the coefficient of x. Where is the x? What is its coefficient?
The y-intercept is the constant term, the one with no x. Where is that term? What is its value?