Algebra 1 STAAR Reporting Category 2 Review for EOC

Answer explanation

Pick two points and use the spreadsheet to find the slope.

Tags

CCSS.8.EE.B.5

What is the rate of change in y per unit change in x for the function 30x+5y=15 ?

Answer explanation

Rate of Change = Slope

Tags

CCSS.HSF-LE.A.1B

• -20

• -5

• -4

• 0

Answer explanation

zero = x-intercept

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Answer explanation

Check for solid or dotted.

Shade above or below?

Tags

CCSS.HSA.REI.D.12

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Answer explanation

Solid or dotted?

Shade above or below?

Tags

CCSS.HSA.REI.D.12

On several evenings last summer, Marisol counted the number of cricket chirps she heard in a minute and recorded the temperature of her surroundings in degrees Fahrenheit. The data she collected are displayed on the scatterplot shown. With the aid of technology, Marisol drew a best-fit line on the scatter plot and used it to predict temperatures based on chirps per minute. To the nearest degree Fahrenheit, what temperature will Marisol expect on an evening when 125 cricket chirps per minute can be heard?

HINT: make a table and use the spreadsheet to graph the line, then find 125 on the table or using the spider.

Answer explanation

Make a table, and use spreadsheet to find the answer.

What is the slope of a line that is parallel to the line containing (-11, 5) and (-6, 1)?

Answer explanation

Spreadsheet

Tags

CCSS.8.EE.B.6

Answer explanation

rate of change = slope

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

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Answer explanation

Parent functions are:

Linear: f(x) = x

Quadratic: f(x) = x^2

Exponential: f(x) = a* b^x

• Its x-intercept is 3 units less than the x-intercept of the graph of f(x), and its y-intercept is 3 units less than the y-intercept of the graph of f(x).

• Its x-intercept is 3 units less than the x-intercept of the graph of f(x), and its y-intercept is 3 units more than the y-intercept of the graph of f(x).

• Its x-intercept is 3 units more than the x-intercept of the graph of f(x), and its y-intercept is 3 units less than the y-intercept of the graph of f(x).

• Its x-intercept is 3 units more than the x-intercept of the graph of f(x), and its y-intercept is 3 units more than the y-intercept of the graph of f(x).

Answer explanation

Graph f(x) = x-3