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