Which of the following has a graph that is a straight line? (4 points)

group of answer choices

equation 1: y = 4x3 + 6

equation 2: y = 5x − 4.5

equation 3: y2 = x − 1

equation 4: y = 2x2 + 6

The equation 2 has a graph which is a straight line.

Why?

We can know which of the given equations has a graph which is a straight line just checking the exponents of the variables.

We must remember that every variable that has an exponent equal or higher than 2 (quadratic) will not have a straight line as a graphic.

So, checking the exponents from the given equations, we have:

Hence, we can see that the only equation that has a linear term (straight line graph), is the second equation.

Have a nice day!

Note: I have attached a image for better understanding.

answer: (1,3) and (-2,0) i think.