Mock Practice Day 3

Mock Practice Day 3

Writing Equations From a Word Problem

• Read the entire problem.

• Determine the variables & _________ by identifying key words.

• Solve the equation using inverse operations.

Multiple Choice

A rectangle’s perimeter and its area have the same numerical value. The width of the rectangle is 3 units. What is the length of the rectangle in units?

• L = 4 units

• L = 3 units

• L = 2 units

• L = 6 units

Volume of a Cone

• The formula for volume of a cone is

   $\frac{1}{3}Bh$  

• "B" stands for _________ of the base.

• All the formulas for area of the base can be found under the _______ category on your STAAR chart.

• The base of a cone is a ___________.

• The formula for area of a circle is ______.

Multiple Choice

• 186.38 in³

• 248.50 in³

• 745.51 in³

• 62.13 in³

Functions

• A function is a rule that assigns each input to exactly one _______.

• A representation is a function when every x-value is associated to exactly ______ y-value.

• To determine if a set of ordered pairs represents a function, make sure that none of the ___- values repeat.

Multiple Choice

Which set of ordered pairs represents y as a function of x?

• {(2, 5), (3, 1), (2, 1), (4, 7)}

• {(3, 2), (4, 3), (5, 2), (2, 6)}

• {(1, 3), (3, 5), (2, 5), (1, 6)}

• {(4, 7), (4, 6), (4, 4), (4, 1)}

Pythagorean Theorem Diagrams

• If the units are squared, the measurement represents _______.

• If units are NOT squared, the measurement represents ____ ________.

• Convert all the measurements into side lengths by calculating the _____ ____.

• Put all side lengths into pythagorean theorem and check if the equation is _______.

Multiple Choice

When three squares are joined at their vertices to form a right triangle, the combined area of the two smaller squares is the same as the area of the largest square. Which three squares do NOT support this statement?

Reflections on a Coordinate Grid

• A reflection _____ a figure over a line of reflection in order to create a mirror image.

• Each reflected point of the figure should be the _____ distance from the line of reflection on the opposite side.

• x-axis reflection rule: (x, y) ---> (x, -y)

• y-axis reflection rule: (x, y) ---> (-x, y)

• After a reflection a pre-image and an image will have _____ side lengths & angles.

Multiple Choice

A circle is graphed on a coordinate grid and then reflected across the y-axis. If the center of the original circle was located at (x,y), which ordered pair represents the center of the new circle after the transformation?

• (x, y)

• (x, -y)

• (-x, y)

• (-x, -y)

Unit Rate

• Unit Rate graphs will always have a y-intercept at the _______.

• Unit rate slope can be found using  $\frac{y}{x}$  ratio.

Multiple Choice

Leanor pays a total of $16.50 for every 6 shirts she has dry-cleaned. Which graph models a relationship with the same unit rate?

Real Numbers on a Number Line

• Convert all numbers into decimal form.

• Remember when it comes to negative numbers: the bigger the negative, the ________ the value.

• Make sure to pay attention to place value.

Multiple Choice

• $\frac{1}{5}$

• 1.6

• 0.09

• $\sqrt{0.02}$

Slope from Similar Triangles

• Find the sides of the triangles that are laying on the same side.

• Using the formula below

   $\frac{y_2-y_1}{x_2-x_1}$  calculate the slope for the two sets of points on the line.

• Testing strategy: Check the proportions for each answer choice to make sure the slope is the _______ on each side.

Multiple Choice

Pythagorean Theorem: Squares & Rectangles

• When given the side lengths of a rectangle, and asked to find the diagonal, use pythagorean theorem to solve for ___.

• When given the area of a square and asked to find the side lengths, take the ______ ____ of the area.

Multiple Choice

Paula completely covered a square wall using 87.5 ft2 of wallpaper without any overlap. Which measurement is closest to the side length of this wall in feet?

• 22 ft

• 44 ft

• 9 ft

• 7 ft

Predictions from a Trendline

• Use a straight edge to draw a trendline or a line of best fit.

• Make sure you have about an equal amount of ______ on both sides of the trendline.

• Check if the question is asking about the x-axis label or the y-axis label.

• Use trendline to make prediction

Multiple Choice

• 30 beats per minute

• 50 beats per minute

• 55 beats per minute

• 60 beats per minute