8th Math STAAR Prep

Front

What is the rule for rotating a point (x,y) 90° counterclockwise around the origin?

Back

(x,y)→(-y,x)

Front

Write the slope-intercept form of the equation for a line with a slope of 2 and a y-intercept of 2.

Back

y = 2x + 2

Front

What is the value of x if the equation represented by tiles equals 3?

Back

x = 3

Front

Solve for x: 2x + 9 - 4x = x - 12.

Back

x = 7

Front

What is the algebraic rule for the dilation that multiplies both x and y by 2?

Back

2x,2y

Front

What is the definition of a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape to create a new shape.

Front

What is the slope of a line that rises 2 units for every 1 unit it runs?

Back

The slope is 2.

Front

How do you find the y-intercept of a linear equation?

Back

Set x = 0 and solve for y.

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and never intersect.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height