Final Exam 8th grade Q2

determine the equation of the line.

• y = 4x + 1/2

• y = 4x - 1/2

• y = - 1/2x + 4

• y = 1/2x + 4

Is the relation shown in the graph a function? Explain

• Yes; for each positive value of x, there is at least one value of y. A function must have at least one output for any single input.

• Yes; for each value of y, there is exactly one value of x. A function cannot have more than one input for any single output.

• No; the graph of any function must be a straight line.

• No; for each positive value of x, there are two values of y. A function cannot have more than one output for any single input.

Determine the equation of the line that models the cost per month for the function shown in the table.

• m = 54t

• t = 54m

• m = 54t + 160

• t= 54m + 160

Determine which function has the greatest change and explain. (Graph, Equation, Table or Sentence)

A relation contains the following ordered pairs.

(−2,0), (3,5), (3,8), (5,8). Is this relation a function? Explain why or why not.

• No. More than one ordered pair has the output value 8

  8. A function is a relation with no repeating output values.

• Yes. Each ordered pair is a unique point on the graph, so the relation is a function.

• No. The ordered pairs do not form a straight line. A function is a relation whose ordered pairs form a straight line when graphed.

• No. The input value 3 has different output values

Which of the following two equations represent the same line? SELECT ALLTHAT APPLY

• 2𝑦 = 3𝑥 + 14

• 𝑦 = 2/3𝑥 + 7

• 𝑦 = 3/2𝑥 + 7

• 𝑦 = − 3/2𝑥 + 14

• 3𝑥 + 2𝑦 = 14

What is the slope-intercept equation of the line with a slope of 3/4 and a y-intercept of 4?

• 𝑦 = 4𝑥 + 3/4

• 𝑦 = 3/4𝑥 + 4

• 3/4𝑥 + 4𝑦 = 0

• 𝑦 = 4 3/4x

What is the slope of the line that goes through the points (3, 5) and (−1, 13)?

Write the equation of the line.

Write the equation 3x - 7y = 14 in Slope Intercept form