Which of the following equations represent linear functions? Select ALL that apply.
***Important Note: In the answer choices below, ^ symbol indicates an exponent. For example, "5^2" means 52, 5 to the 2nd power, or 5 times 5.
Group of answer choices
y = 5x + 7
d = -2t + 3
y = x^2 - 5
y = 4 + x
y = 6^x + 2
y = -x
y = 5