Final answer:
The correct slope-intercept equation for Kiah's film skating portfolio, where she starts with 7 pictures and adds 4 photos per week, is represented by the equation (b) y = 4x + 7.
Step-by-step explanation:
The question asks to find the slope-intercept equation for Kiah's film skating portfolio, where she starts with 7 pictures and adds 4 photos per week. The slope-intercept form of a linear equation is given by y = mx + b, where m represents the slope and b represents the y-intercept.
In this case, the slope (m) is the number of photos added each week, which is 4. The y-intercept (b) is the initial number of photos, which is 7. Therefore, the slope-intercept equation representing the situation is y = 4x + 7.