Question 7
which equation represents a linear function?
x = 3
y = -3x + 10
y = 3x2 + 1
y=16/x

y = -3x + 10  

Step-by-step explanation:

The general equation of a linear function is y = mx + b.

If we substitute the values m = -3 and b = 10, we get y = -3x + 10

A is wrong. The graph of x = 3, but it is not a function, because there are many values of y that correspond to x = 3.

C is wrong. The equation represents a parabola .

D is wrong. The equation represents a hyperbola.

Since both are on the line y=10, the distance between the points is their difference in x-coordinates: 15 - (-30) = 45 units.