Algebra Formula Review

To find the x-intercept of a function, you should:

• Set x = 0

• Set y or f(x) = 0

• Solve for m

• set x =b

To find the y-intercept of a function you should

• Set x = 0

• Solve for m

• Set y or f(x) = 0

• Set x =b

The graph of x= a is

• a vertical line

• a horizontal line

• a line with slope a

• a line with y-intercept a

The graph of y = c is

• a horizontal line

• a vertical line

• a line with slope c

• a line with x-intercept c

The slope of a line is given by which of the following:

• $m\ =\ \frac{x_1-x_2}{y_1-y_2}$

• $m\ =\ \frac{y_1-y_2}{x_1-x_2}$

• $y\ =\ mx\ +\ b$

• $y\ -\ y_1=\ m\left(x-x_1\right)$

The point-slope form of a line is given by

• $m\ =\ \frac{x_1-x_2}{y_1-y_2}$

• $m\ =\ \frac{y_1-y_2}{x_1-x_2}$

• $y\ =\ mx\ +\ b$

• $y\ -\ y_1=\ m\left(x-x_1\right)$

The slope-intercept form of a line is given by: 

• $m\ =\ \frac{x_1-x_2}{y_1-y_2}$

• $m\ =\ \frac{y_1-y_2}{x_1-x_2}$

• $y\ =\ mx\ +\ b$

• $y\ -\ y_1=\ m\left(x-x_1\right)$

Which of the following is NOT a function?

• {(2,1),(3,1),(4,1),(5,1)}

• {(1,2),(1,3), (1,4),(1,5)}

• {(1,1),(2,2),(3,3),(4,4)}

The horizontal line passing through the point (c,d) has the equations

• x = c

• x = d

• y = c

• y = d

The vertical line passing through the point (c,d) has the equations

• x = c

• x = d

• y = c

• y = d