The equation \( y = -4x + 10 \) defines a linear function. Its graph is a straight line with a slope of -4 and a y-intercept of 10.
- The slope of -4 means that for every 1 unit increase in \( x \), \( y \) decreases by 4 units.
- The y-intercept indicates that the line crosses the y-axis at the point (0, 10).
The correct description from your options would be: "This is a linear function. Its graph is a straight line with a slope of -4 and a y-intercept of 10."