Final answer:
To find the x-intercept, you need an equation of the line, y = mx + b, and set y to zero. The question lacks enough information to determine the x-intercept, as it does not include an equation or method for obtaining one from the given pairs of (x, y) values.
Step-by-step explanation:
To find the x-intercept of a line, we must determine the point at which the line crosses the x-axis. This occurs when the y-value is zero. Given pairs of x and y values, we can write coordinates as (x, y). For example, combining -21 from the x-values and -48 from the y-values gives us the coordinate (-21, -48). We repeat this for the remaining values obtaining (-64, -9) and (-15, -32).
However, to find the x-intercept, we need an equation of the line. The information provided does not include an equation, and thus we cannot determine the x-intercept directly from the given pairs. A method to find the x-intercept is to plot the points, find the slope (m), use the slope to write an equation of the form y = mx + b, and set y to zero to solve for x. Since this information is not provided, we cannot answer the student's question regarding the x-intercept.