Question

Which of the following has a graph that is a straight line? (4 points) Equation 4: y = 3x3 Equation 3: y = 2x2 + 4 Equation 1: y = 2x + 7 Equation 2: y2 = x − 1

Answer 1

Answer:

Equation 1: y = 2x + 7  has a graph that is a straight line

Step-by-step explanation:

Equation 4: y = 3x^3

Equation 3: y = 2x^2 + 4

Equation 1: y = 2x + 7

Equation 2: y^2 = x − 1

The graph will be a straight line for linear equation

When the largest exponent is 1 then it is a linear equation

Equation 1: y = 2x + 7 , largest exponent is 1 so it is linear

Equation 2: y^2 = x − 1, highest exponent is 2 so it is not linear

Equation 3: y = 2x^2 + 4 , highest exponent is 2 so it is not linear

Equation 4: y = 3x^3 , highest exponent is 3 so it is not linear

Equation 1: y = 2x + 7  has a graph that is a straight line

Answer 2

The equation of the line: y = mx + b.

Therefore your answer is Equation 1: y = 2x + 7.